Restoring authorship annotation for <orivej@yandex-team.ru>. Commit 1 of 2.

1 files changed, 1588 insertions, 1588 deletions

diff --git a/contrib/libs/cctz/test/time_zone_format_test.cc b/contrib/libs/cctz/test/time_zone_format_test.cc
index 0d07dad5c0..724836fa14 100644
--- a/contrib/libs/cctz/test/time_zone_format_test.cc
+++ b/contrib/libs/cctz/test/time_zone_format_test.cc
@@ -1,1588 +1,1588 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "cctz/time_zone.h"
-
-#include <chrono>
-#include <iomanip>
-#include <sstream>
-#include <string>
-
-#include "cctz/civil_time.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace chrono = std::chrono;
-
-namespace cctz {
-
-namespace {
-
-// This helper is a macro so that failed expectations show up with the
-// correct line numbers.
-#define ExpectTime(tp, tz, y, m, d, hh, mm, ss, off, isdst, zone) \
-  do {                                                            \
-    time_zone::absolute_lookup al = tz.lookup(tp);                \
-    EXPECT_EQ(y, al.cs.year());                                   \
-    EXPECT_EQ(m, al.cs.month());                                  \
-    EXPECT_EQ(d, al.cs.day());                                    \
-    EXPECT_EQ(hh, al.cs.hour());                                  \
-    EXPECT_EQ(mm, al.cs.minute());                                \
-    EXPECT_EQ(ss, al.cs.second());                                \
-    EXPECT_EQ(off, al.offset);                                    \
-    EXPECT_TRUE(isdst == al.is_dst);                              \
-    EXPECT_STREQ(zone, al.abbr);                                  \
-  } while (0)
-
-const char RFC3339_full[] = "%Y-%m-%d%ET%H:%M:%E*S%Ez";
-const char RFC3339_sec[] =  "%Y-%m-%d%ET%H:%M:%S%Ez";
-
-const char RFC1123_full[] = "%a, %d %b %Y %H:%M:%S %z";
-const char RFC1123_no_wday[] =  "%d %b %Y %H:%M:%S %z";
-
-// A helper that tests the given format specifier by itself, and with leading
-// and trailing characters.  For example: TestFormatSpecifier(tp, "%a", "Thu").
-template <typename D>
-void TestFormatSpecifier(time_point<D> tp, time_zone tz, const std::string& fmt,
-                         const std::string& ans) {
-  EXPECT_EQ(ans, format(fmt, tp, tz)) << fmt;
-  EXPECT_EQ("xxx " + ans, format("xxx " + fmt, tp, tz));
-  EXPECT_EQ(ans + " yyy", format(fmt + " yyy", tp, tz));
-  EXPECT_EQ("xxx " + ans + " yyy", format("xxx " + fmt + " yyy", tp, tz));
-}
-
-}  // namespace
-
-//
-// Testing format()
-//
-
-TEST(Format, TimePointResolution) {
-  const char kFmt[] = "%H:%M:%E*S";
-  const time_zone utc = utc_time_zone();
-  const time_point<chrono::nanoseconds> t0 =
-      chrono::system_clock::from_time_t(1420167845) +
-      chrono::milliseconds(123) + chrono::microseconds(456) +
-      chrono::nanoseconds(789);
-  EXPECT_EQ(
-      "03:04:05.123456789",
-      format(kFmt, chrono::time_point_cast<chrono::nanoseconds>(t0), utc));
-  EXPECT_EQ(
-      "03:04:05.123456",
-      format(kFmt, chrono::time_point_cast<chrono::microseconds>(t0), utc));
-  EXPECT_EQ(
-      "03:04:05.123",
-      format(kFmt, chrono::time_point_cast<chrono::milliseconds>(t0), utc));
-  EXPECT_EQ("03:04:05",
-            format(kFmt, chrono::time_point_cast<chrono::seconds>(t0), utc));
-  EXPECT_EQ("03:04:05",
-            format(kFmt, chrono::time_point_cast<cctz::seconds>(t0), utc));
-  EXPECT_EQ("03:04:00",
-            format(kFmt, chrono::time_point_cast<chrono::minutes>(t0), utc));
-  EXPECT_EQ("03:00:00",
-            format(kFmt, chrono::time_point_cast<chrono::hours>(t0), utc));
-}
-
-TEST(Format, TimePointExtendedResolution) {
-  const char kFmt[] = "%H:%M:%E*S";
-  const time_zone utc = utc_time_zone();
-  const time_point<cctz::seconds> tp =
-      chrono::time_point_cast<cctz::seconds>(
-          chrono::system_clock::from_time_t(0)) +
-      chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56);
-
-  EXPECT_EQ(
-      "12:34:56.123456789012345",
-      detail::format(kFmt, tp, detail::femtoseconds(123456789012345), utc));
-  EXPECT_EQ(
-      "12:34:56.012345678901234",
-      detail::format(kFmt, tp, detail::femtoseconds(12345678901234), utc));
-  EXPECT_EQ(
-      "12:34:56.001234567890123",
-      detail::format(kFmt, tp, detail::femtoseconds(1234567890123), utc));
-  EXPECT_EQ(
-      "12:34:56.000123456789012",
-      detail::format(kFmt, tp, detail::femtoseconds(123456789012), utc));
-
-  EXPECT_EQ("12:34:56.000000000000123",
-            detail::format(kFmt, tp, detail::femtoseconds(123), utc));
-  EXPECT_EQ("12:34:56.000000000000012",
-            detail::format(kFmt, tp, detail::femtoseconds(12), utc));
-  EXPECT_EQ("12:34:56.000000000000001",
-            detail::format(kFmt, tp, detail::femtoseconds(1), utc));
-}
-
-TEST(Format, Basics) {
-  time_zone tz = utc_time_zone();
-  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0);
-
-  // Starts with a couple basic edge cases.
-  EXPECT_EQ("", format("", tp, tz));
-  EXPECT_EQ(" ", format(" ", tp, tz));
-  EXPECT_EQ("  ", format("  ", tp, tz));
-  EXPECT_EQ("xxx", format("xxx", tp, tz));
-  std::string big(128, 'x');
-  EXPECT_EQ(big, format(big, tp, tz));
-  // Cause the 1024-byte buffer to grow.
-  std::string bigger(100000, 'x');
-  EXPECT_EQ(bigger, format(bigger, tp, tz));
-
-  tp += chrono::hours(13) + chrono::minutes(4) + chrono::seconds(5);
-  tp += chrono::milliseconds(6) + chrono::microseconds(7) +
-        chrono::nanoseconds(8);
-  EXPECT_EQ("1970-01-01", format("%Y-%m-%d", tp, tz));
-  EXPECT_EQ("13:04:05", format("%H:%M:%S", tp, tz));
-  EXPECT_EQ("13:04:05.006", format("%H:%M:%E3S", tp, tz));
-  EXPECT_EQ("13:04:05.006007", format("%H:%M:%E6S", tp, tz));
-  EXPECT_EQ("13:04:05.006007008", format("%H:%M:%E9S", tp, tz));
-}
-
-TEST(Format, PosixConversions) {
-  const time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-
-  TestFormatSpecifier(tp, tz, "%d", "01");
-  TestFormatSpecifier(tp, tz, "%e", " 1");  // extension but internal support
-  TestFormatSpecifier(tp, tz, "%H", "00");
-  TestFormatSpecifier(tp, tz, "%I", "12");
-  TestFormatSpecifier(tp, tz, "%j", "001");
-  TestFormatSpecifier(tp, tz, "%m", "01");
-  TestFormatSpecifier(tp, tz, "%M", "00");
-  TestFormatSpecifier(tp, tz, "%S", "00");
-  TestFormatSpecifier(tp, tz, "%U", "00");
-  TestFormatSpecifier(tp, tz, "%w", "4");  // 4=Thursday
-  TestFormatSpecifier(tp, tz, "%W", "00");
-  TestFormatSpecifier(tp, tz, "%y", "70");
-  TestFormatSpecifier(tp, tz, "%Y", "1970");
-  TestFormatSpecifier(tp, tz, "%z", "+0000");
-  TestFormatSpecifier(tp, tz, "%Z", "UTC");
-  TestFormatSpecifier(tp, tz, "%%", "%");
-
-#if defined(__linux__)
-  // SU/C99/TZ extensions
-  TestFormatSpecifier(tp, tz, "%C", "19");
-  TestFormatSpecifier(tp, tz, "%D", "01/01/70");
-  TestFormatSpecifier(tp, tz, "%F", "1970-01-01");
-  TestFormatSpecifier(tp, tz, "%g", "70");
-  TestFormatSpecifier(tp, tz, "%G", "1970");
-  TestFormatSpecifier(tp, tz, "%k", " 0");
-  TestFormatSpecifier(tp, tz, "%l", "12");
-  TestFormatSpecifier(tp, tz, "%n", "\n");
-  TestFormatSpecifier(tp, tz, "%R", "00:00");
-  TestFormatSpecifier(tp, tz, "%t", "\t");
-  TestFormatSpecifier(tp, tz, "%T", "00:00:00");
-  TestFormatSpecifier(tp, tz, "%u", "4");  // 4=Thursday
-  TestFormatSpecifier(tp, tz, "%V", "01");
-  TestFormatSpecifier(tp, tz, "%s", "0");
-#endif
-}
-
-TEST(Format, LocaleSpecific) {
-  const time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-
-  TestFormatSpecifier(tp, tz, "%a", "Thu");
-  TestFormatSpecifier(tp, tz, "%A", "Thursday");
-  TestFormatSpecifier(tp, tz, "%b", "Jan");
-  TestFormatSpecifier(tp, tz, "%B", "January");
-
-  // %c should at least produce the numeric year and time-of-day.
-  const std::string s = format("%c", tp, utc_time_zone());
-  EXPECT_THAT(s, testing::HasSubstr("1970"));
-  EXPECT_THAT(s, testing::HasSubstr("00:00:00"));
-
-  TestFormatSpecifier(tp, tz, "%p", "AM");
-  TestFormatSpecifier(tp, tz, "%x", "01/01/70");
-  TestFormatSpecifier(tp, tz, "%X", "00:00:00");
-
-#if defined(__linux__)
-  // SU/C99/TZ extensions
-  TestFormatSpecifier(tp, tz, "%h", "Jan");  // Same as %b
-  TestFormatSpecifier(tp, tz, "%P", "am");
-  TestFormatSpecifier(tp, tz, "%r", "12:00:00 AM");
-
-  // Modified conversion specifiers %E_
-  TestFormatSpecifier(tp, tz, "%Ec", "Thu Jan  1 00:00:00 1970");
-  TestFormatSpecifier(tp, tz, "%EC", "19");
-  TestFormatSpecifier(tp, tz, "%Ex", "01/01/70");
-  TestFormatSpecifier(tp, tz, "%EX", "00:00:00");
-  TestFormatSpecifier(tp, tz, "%Ey", "70");
-  TestFormatSpecifier(tp, tz, "%EY", "1970");
-
-  // Modified conversion specifiers %O_
-  TestFormatSpecifier(tp, tz, "%Od", "01");
-  TestFormatSpecifier(tp, tz, "%Oe", " 1");
-  TestFormatSpecifier(tp, tz, "%OH", "00");
-  TestFormatSpecifier(tp, tz, "%OI", "12");
-  TestFormatSpecifier(tp, tz, "%Om", "01");
-  TestFormatSpecifier(tp, tz, "%OM", "00");
-  TestFormatSpecifier(tp, tz, "%OS", "00");
-  TestFormatSpecifier(tp, tz, "%Ou", "4");  // 4=Thursday
-  TestFormatSpecifier(tp, tz, "%OU", "00");
-  TestFormatSpecifier(tp, tz, "%OV", "01");
-  TestFormatSpecifier(tp, tz, "%Ow", "4");  // 4=Thursday
-  TestFormatSpecifier(tp, tz, "%OW", "00");
-  TestFormatSpecifier(tp, tz, "%Oy", "70");
-#endif
-}
-
-TEST(Format, Escaping) {
-  const time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-
-  TestFormatSpecifier(tp, tz, "%%", "%");
-  TestFormatSpecifier(tp, tz, "%%a", "%a");
-  TestFormatSpecifier(tp, tz, "%%b", "%b");
-  TestFormatSpecifier(tp, tz, "%%Ea", "%Ea");
-  TestFormatSpecifier(tp, tz, "%%Es", "%Es");
-  TestFormatSpecifier(tp, tz, "%%E3S", "%E3S");
-  TestFormatSpecifier(tp, tz, "%%OS", "%OS");
-  TestFormatSpecifier(tp, tz, "%%O3S", "%O3S");
-
-  // Multiple levels of escaping.
-  TestFormatSpecifier(tp, tz, "%%%Y", "%1970");
-  TestFormatSpecifier(tp, tz, "%%%E3S", "%00.000");
-  TestFormatSpecifier(tp, tz, "%%%%E3S", "%%E3S");
-}
-
-TEST(Format, ExtendedSeconds) {
-  const time_zone tz = utc_time_zone();
-
-  // No subseconds.
-  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0);
-  tp += chrono::seconds(5);
-  EXPECT_EQ("05", format("%E*S", tp, tz));
-  EXPECT_EQ("05", format("%E0S", tp, tz));
-  EXPECT_EQ("05.0", format("%E1S", tp, tz));
-  EXPECT_EQ("05.00", format("%E2S", tp, tz));
-  EXPECT_EQ("05.000", format("%E3S", tp, tz));
-  EXPECT_EQ("05.0000", format("%E4S", tp, tz));
-  EXPECT_EQ("05.00000", format("%E5S", tp, tz));
-  EXPECT_EQ("05.000000", format("%E6S", tp, tz));
-  EXPECT_EQ("05.0000000", format("%E7S", tp, tz));
-  EXPECT_EQ("05.00000000", format("%E8S", tp, tz));
-  EXPECT_EQ("05.000000000", format("%E9S", tp, tz));
-  EXPECT_EQ("05.0000000000", format("%E10S", tp, tz));
-  EXPECT_EQ("05.00000000000", format("%E11S", tp, tz));
-  EXPECT_EQ("05.000000000000", format("%E12S", tp, tz));
-  EXPECT_EQ("05.0000000000000", format("%E13S", tp, tz));
-  EXPECT_EQ("05.00000000000000", format("%E14S", tp, tz));
-  EXPECT_EQ("05.000000000000000", format("%E15S", tp, tz));
-
-  // With subseconds.
-  tp += chrono::milliseconds(6) + chrono::microseconds(7) +
-        chrono::nanoseconds(8);
-  EXPECT_EQ("05.006007008", format("%E*S", tp, tz));
-  EXPECT_EQ("05", format("%E0S", tp, tz));
-  EXPECT_EQ("05.0", format("%E1S", tp, tz));
-  EXPECT_EQ("05.00", format("%E2S", tp, tz));
-  EXPECT_EQ("05.006", format("%E3S", tp, tz));
-  EXPECT_EQ("05.0060", format("%E4S", tp, tz));
-  EXPECT_EQ("05.00600", format("%E5S", tp, tz));
-  EXPECT_EQ("05.006007", format("%E6S", tp, tz));
-  EXPECT_EQ("05.0060070", format("%E7S", tp, tz));
-  EXPECT_EQ("05.00600700", format("%E8S", tp, tz));
-  EXPECT_EQ("05.006007008", format("%E9S", tp, tz));
-  EXPECT_EQ("05.0060070080", format("%E10S", tp, tz));
-  EXPECT_EQ("05.00600700800", format("%E11S", tp, tz));
-  EXPECT_EQ("05.006007008000", format("%E12S", tp, tz));
-  EXPECT_EQ("05.0060070080000", format("%E13S", tp, tz));
-  EXPECT_EQ("05.00600700800000", format("%E14S", tp, tz));
-  EXPECT_EQ("05.006007008000000", format("%E15S", tp, tz));
-
-  // Times before the Unix epoch.
-  tp = chrono::system_clock::from_time_t(0) + chrono::microseconds(-1);
-  EXPECT_EQ("1969-12-31 23:59:59.999999",
-            format("%Y-%m-%d %H:%M:%E*S", tp, tz));
-
-  // Here is a "%E*S" case we got wrong for a while.  While the first
-  // instant below is correctly rendered as "...:07.333304", the second
-  // one used to appear as "...:07.33330499999999999".
-  tp = chrono::system_clock::from_time_t(0) +
-       chrono::microseconds(1395024427333304);
-  EXPECT_EQ("2014-03-17 02:47:07.333304",
-            format("%Y-%m-%d %H:%M:%E*S", tp, tz));
-  tp += chrono::microseconds(1);
-  EXPECT_EQ("2014-03-17 02:47:07.333305",
-            format("%Y-%m-%d %H:%M:%E*S", tp, tz));
-}
-
-TEST(Format, ExtendedSubeconds) {
-  const time_zone tz = utc_time_zone();
-
-  // No subseconds.
-  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0);
-  tp += chrono::seconds(5);
-  EXPECT_EQ("0", format("%E*f", tp, tz));
-  EXPECT_EQ("", format("%E0f", tp, tz));
-  EXPECT_EQ("0", format("%E1f", tp, tz));
-  EXPECT_EQ("00", format("%E2f", tp, tz));
-  EXPECT_EQ("000", format("%E3f", tp, tz));
-  EXPECT_EQ("0000", format("%E4f", tp, tz));
-  EXPECT_EQ("00000", format("%E5f", tp, tz));
-  EXPECT_EQ("000000", format("%E6f", tp, tz));
-  EXPECT_EQ("0000000", format("%E7f", tp, tz));
-  EXPECT_EQ("00000000", format("%E8f", tp, tz));
-  EXPECT_EQ("000000000", format("%E9f", tp, tz));
-  EXPECT_EQ("0000000000", format("%E10f", tp, tz));
-  EXPECT_EQ("00000000000", format("%E11f", tp, tz));
-  EXPECT_EQ("000000000000", format("%E12f", tp, tz));
-  EXPECT_EQ("0000000000000", format("%E13f", tp, tz));
-  EXPECT_EQ("00000000000000", format("%E14f", tp, tz));
-  EXPECT_EQ("000000000000000", format("%E15f", tp, tz));
-
-  // With subseconds.
-  tp += chrono::milliseconds(6) + chrono::microseconds(7) +
-        chrono::nanoseconds(8);
-  EXPECT_EQ("006007008", format("%E*f", tp, tz));
-  EXPECT_EQ("", format("%E0f", tp, tz));
-  EXPECT_EQ("0", format("%E1f", tp, tz));
-  EXPECT_EQ("00", format("%E2f", tp, tz));
-  EXPECT_EQ("006", format("%E3f", tp, tz));
-  EXPECT_EQ("0060", format("%E4f", tp, tz));
-  EXPECT_EQ("00600", format("%E5f", tp, tz));
-  EXPECT_EQ("006007", format("%E6f", tp, tz));
-  EXPECT_EQ("0060070", format("%E7f", tp, tz));
-  EXPECT_EQ("00600700", format("%E8f", tp, tz));
-  EXPECT_EQ("006007008", format("%E9f", tp, tz));
-  EXPECT_EQ("0060070080", format("%E10f", tp, tz));
-  EXPECT_EQ("00600700800", format("%E11f", tp, tz));
-  EXPECT_EQ("006007008000", format("%E12f", tp, tz));
-  EXPECT_EQ("0060070080000", format("%E13f", tp, tz));
-  EXPECT_EQ("00600700800000", format("%E14f", tp, tz));
-  EXPECT_EQ("006007008000000", format("%E15f", tp, tz));
-
-  // Times before the Unix epoch.
-  tp = chrono::system_clock::from_time_t(0) + chrono::microseconds(-1);
-  EXPECT_EQ("1969-12-31 23:59:59.999999",
-            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz));
-
-  // Here is a "%E*S" case we got wrong for a while.  While the first
-  // instant below is correctly rendered as "...:07.333304", the second
-  // one used to appear as "...:07.33330499999999999".
-  tp = chrono::system_clock::from_time_t(0) +
-       chrono::microseconds(1395024427333304);
-  EXPECT_EQ("2014-03-17 02:47:07.333304",
-            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz));
-  tp += chrono::microseconds(1);
-  EXPECT_EQ("2014-03-17 02:47:07.333305",
-            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz));
-}
-
-TEST(Format, CompareExtendSecondsVsSubseconds) {
-  const time_zone tz = utc_time_zone();
-
-  // This test case illustrates the differences/similarities between:
-  //   fmt_A: %E<prec>S
-  //   fmt_B: %S.%E<prec>f
-  auto fmt_A = [](const std::string& prec) { return "%E" + prec + "S"; };
-  auto fmt_B = [](const std::string& prec) { return "%S.%E" + prec + "f"; };
-
-  // No subseconds:
-  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0);
-  tp += chrono::seconds(5);
-  // ... %E*S and %S.%E*f are different.
-  EXPECT_EQ("05", format(fmt_A("*"), tp, tz));
-  EXPECT_EQ("05.0", format(fmt_B("*"), tp, tz));
-  // ... %E0S and %S.%E0f are different.
-  EXPECT_EQ("05", format(fmt_A("0"), tp, tz));
-  EXPECT_EQ("05.", format(fmt_B("0"), tp, tz));
-  // ... %E<prec>S and %S.%E<prec>f are the same for prec in [1:15].
-  for (int prec = 1; prec <= 15; ++prec) {
-    const std::string a = format(fmt_A(std::to_string(prec)), tp, tz);
-    const std::string b = format(fmt_B(std::to_string(prec)), tp, tz);
-    EXPECT_EQ(a, b) << "prec=" << prec;
-  }
-
-  // With subseconds:
-  // ... %E*S and %S.%E*f are the same.
-  tp += chrono::milliseconds(6) + chrono::microseconds(7) +
-        chrono::nanoseconds(8);
-  EXPECT_EQ("05.006007008", format(fmt_A("*"), tp, tz));
-  EXPECT_EQ("05.006007008", format(fmt_B("*"), tp, tz));
-  // ... %E0S and %S.%E0f are different.
-  EXPECT_EQ("05", format(fmt_A("0"), tp, tz));
-  EXPECT_EQ("05.", format(fmt_B("0"), tp, tz));
-  // ... %E<prec>S and %S.%E<prec>f are the same for prec in [1:15].
-  for (int prec = 1; prec <= 15; ++prec) {
-    const std::string a = format(fmt_A(std::to_string(prec)), tp, tz);
-    const std::string b = format(fmt_B(std::to_string(prec)), tp, tz);
-    EXPECT_EQ(a, b) << "prec=" << prec;
-  }
-}
-
-TEST(Format, ExtendedOffset) {
-  const auto tp = chrono::system_clock::from_time_t(0);
-
-  auto tz = fixed_time_zone(cctz::seconds::zero());
-  TestFormatSpecifier(tp, tz, "%z", "+0000");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:00");
-
-  tz = fixed_time_zone(chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "+0000");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:00");
-
-  tz = fixed_time_zone(-chrono::seconds(56));  // NOTE: +00:00
-  TestFormatSpecifier(tp, tz, "%z", "+0000");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:00");
-
-  tz = fixed_time_zone(chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%z", "+0034");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:34");
-
-  tz = fixed_time_zone(-chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%z", "-0034");
-  TestFormatSpecifier(tp, tz, "%:z", "-00:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "-00:34");
-
-  tz = fixed_time_zone(chrono::minutes(34) + chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "+0034");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:34");
-
-  tz = fixed_time_zone(-chrono::minutes(34) - chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "-0034");
-  TestFormatSpecifier(tp, tz, "%:z", "-00:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "-00:34");
-
-  tz = fixed_time_zone(chrono::hours(12));
-  TestFormatSpecifier(tp, tz, "%z", "+1200");
-  TestFormatSpecifier(tp, tz, "%:z", "+12:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+12:00");
-
-  tz = fixed_time_zone(-chrono::hours(12));
-  TestFormatSpecifier(tp, tz, "%z", "-1200");
-  TestFormatSpecifier(tp, tz, "%:z", "-12:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "-12:00");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "+1200");
-  TestFormatSpecifier(tp, tz, "%:z", "+12:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+12:00");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "-1200");
-  TestFormatSpecifier(tp, tz, "%:z", "-12:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "-12:00");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%z", "+1234");
-  TestFormatSpecifier(tp, tz, "%:z", "+12:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "+12:34");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%z", "-1234");
-  TestFormatSpecifier(tp, tz, "%:z", "-12:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "-12:34");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34) +
-                       chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "+1234");
-  TestFormatSpecifier(tp, tz, "%:z", "+12:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "+12:34");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34) -
-                       chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "-1234");
-  TestFormatSpecifier(tp, tz, "%:z", "-12:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "-12:34");
-}
-
-TEST(Format, ExtendedSecondOffset) {
-  const auto tp = chrono::system_clock::from_time_t(0);
-
-  auto tz = fixed_time_zone(cctz::seconds::zero());
-  TestFormatSpecifier(tp, tz, "%E*z", "+00:00:00");
-  TestFormatSpecifier(tp, tz, "%::z", "+00:00:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "+00");
-
-  tz = fixed_time_zone(chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "+00:00:56");
-  TestFormatSpecifier(tp, tz, "%::z", "+00:00:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "+00:00:56");
-
-  tz = fixed_time_zone(-chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "-00:00:56");
-  TestFormatSpecifier(tp, tz, "%::z", "-00:00:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "-00:00:56");
-
-  tz = fixed_time_zone(chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%E*z", "+00:34:00");
-  TestFormatSpecifier(tp, tz, "%::z", "+00:34:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "+00:34");
-
-  tz = fixed_time_zone(-chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%E*z", "-00:34:00");
-  TestFormatSpecifier(tp, tz, "%::z", "-00:34:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "-00:34");
-
-  tz = fixed_time_zone(chrono::minutes(34) + chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "+00:34:56");
-  TestFormatSpecifier(tp, tz, "%::z", "+00:34:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "+00:34:56");
-
-  tz = fixed_time_zone(-chrono::minutes(34) - chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "-00:34:56");
-  TestFormatSpecifier(tp, tz, "%::z", "-00:34:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "-00:34:56");
-
-  tz = fixed_time_zone(chrono::hours(12));
-  TestFormatSpecifier(tp, tz, "%E*z", "+12:00:00");
-  TestFormatSpecifier(tp, tz, "%::z", "+12:00:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "+12");
-
-  tz = fixed_time_zone(-chrono::hours(12));
-  TestFormatSpecifier(tp, tz, "%E*z", "-12:00:00");
-  TestFormatSpecifier(tp, tz, "%::z", "-12:00:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "-12");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "+12:00:56");
-  TestFormatSpecifier(tp, tz, "%::z", "+12:00:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "+12:00:56");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "-12:00:56");
-  TestFormatSpecifier(tp, tz, "%::z", "-12:00:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "-12:00:56");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%E*z", "+12:34:00");
-  TestFormatSpecifier(tp, tz, "%::z", "+12:34:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "+12:34");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%E*z", "-12:34:00");
-  TestFormatSpecifier(tp, tz, "%::z", "-12:34:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "-12:34");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34) +
-                       chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "+12:34:56");
-  TestFormatSpecifier(tp, tz, "%::z", "+12:34:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "+12:34:56");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34) -
-                       chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "-12:34:56");
-  TestFormatSpecifier(tp, tz, "%::z", "-12:34:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "-12:34:56");
-}
-
-TEST(Format, ExtendedYears) {
-  const time_zone utc = utc_time_zone();
-  const char e4y_fmt[] = "%E4Y%m%d";  // no separators
-
-  // %E4Y zero-pads the year to produce at least 4 chars, including the sign.
-  auto tp = convert(civil_second(-999, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-9991127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(-99, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-0991127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(-9, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-0091127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(-1, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-0011127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(0, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("00001127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(1, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("00011127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(9, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("00091127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(99, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("00991127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(999, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("09991127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(9999, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("99991127", format(e4y_fmt, tp, utc));
-
-  // When the year is outside [-999:9999], more than 4 chars are produced.
-  tp = convert(civil_second(-1000, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-10001127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(10000, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("100001127", format(e4y_fmt, tp, utc));
-}
-
-TEST(Format, RFC3339Format) {
-  time_zone tz;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz));
-
-  time_point<chrono::nanoseconds> tp =
-      convert(civil_second(1977, 6, 28, 9, 8, 7), tz);
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::milliseconds(100);
-  EXPECT_EQ("1977-06-28T09:08:07.1-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::milliseconds(20);
-  EXPECT_EQ("1977-06-28T09:08:07.12-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::milliseconds(3);
-  EXPECT_EQ("1977-06-28T09:08:07.123-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::microseconds(400);
-  EXPECT_EQ("1977-06-28T09:08:07.1234-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::microseconds(50);
-  EXPECT_EQ("1977-06-28T09:08:07.12345-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::microseconds(6);
-  EXPECT_EQ("1977-06-28T09:08:07.123456-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::nanoseconds(700);
-  EXPECT_EQ("1977-06-28T09:08:07.1234567-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::nanoseconds(80);
-  EXPECT_EQ("1977-06-28T09:08:07.12345678-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::nanoseconds(9);
-  EXPECT_EQ("1977-06-28T09:08:07.123456789-07:00",
-            format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-}
-
-TEST(Format, RFC1123Format) {  // locale specific
-  time_zone tz;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz));
-
-  auto tp = convert(civil_second(1977, 6, 28, 9, 8, 7), tz);
-  EXPECT_EQ("Tue, 28 Jun 1977 09:08:07 -0700", format(RFC1123_full, tp, tz));
-  EXPECT_EQ("28 Jun 1977 09:08:07 -0700", format(RFC1123_no_wday, tp, tz));
-}
-
-TEST(Format, Week) {
-  const time_zone utc = utc_time_zone();
-
-  auto tp = convert(civil_second(2017, 1, 1, 0, 0, 0), utc);
-  EXPECT_EQ("2017-01-7", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2017-00-0", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2017, 12, 31, 0, 0, 0), utc);
-  EXPECT_EQ("2017-53-7", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2017-52-0", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2018, 1, 1, 0, 0, 0), utc);
-  EXPECT_EQ("2018-00-1", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2018-01-1", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2018, 12, 31, 0, 0, 0), utc);
-  EXPECT_EQ("2018-52-1", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2018-53-1", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2019, 1, 1, 0, 0, 0), utc);
-  EXPECT_EQ("2019-00-2", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2019-00-2", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc);
-  EXPECT_EQ("2019-52-2", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2019-52-2", format("%Y-%W-%w", tp, utc));
-}
-
-//
-// Testing parse()
-//
-
-TEST(Parse, TimePointResolution) {
-  const char kFmt[] = "%H:%M:%E*S";
-  const time_zone utc = utc_time_zone();
-
-  time_point<chrono::nanoseconds> tp_ns;
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456789", utc, &tp_ns));
-  EXPECT_EQ("03:04:05.123456789", format(kFmt, tp_ns, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_ns));
-  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_ns, utc));
-
-  time_point<chrono::microseconds> tp_us;
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456789", utc, &tp_us));
-  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_us, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_us));
-  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_us, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_us));
-  EXPECT_EQ("03:04:05.123", format(kFmt, tp_us, utc));
-
-  time_point<chrono::milliseconds> tp_ms;
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_ms));
-  EXPECT_EQ("03:04:05.123", format(kFmt, tp_ms, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_ms));
-  EXPECT_EQ("03:04:05.123", format(kFmt, tp_ms, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_ms));
-  EXPECT_EQ("03:04:05", format(kFmt, tp_ms, utc));
-
-  time_point<chrono::seconds> tp_s;
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_s));
-  EXPECT_EQ("03:04:05", format(kFmt, tp_s, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_s));
-  EXPECT_EQ("03:04:05", format(kFmt, tp_s, utc));
-
-  time_point<chrono::minutes> tp_m;
-  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_m));
-  EXPECT_EQ("03:04:00", format(kFmt, tp_m, utc));
-
-  time_point<chrono::hours> tp_h;
-  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_h));
-  EXPECT_EQ("03:00:00", format(kFmt, tp_h, utc));
-}
-
-TEST(Parse, TimePointExtendedResolution) {
-  const char kFmt[] = "%H:%M:%E*S";
-  const time_zone utc = utc_time_zone();
-
-  time_point<cctz::seconds> tp;
-  detail::femtoseconds fs;
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.123456789012345", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.123456789012345", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.012345678901234", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.012345678901234", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.001234567890123", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.001234567890123", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000123", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.000000000000123", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000012", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.000000000000012", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000001", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.000000000000001", detail::format(kFmt, tp, fs, utc));
-}
-
-TEST(Parse, Basics) {
-  time_zone tz = utc_time_zone();
-  time_point<chrono::nanoseconds> tp =
-      chrono::system_clock::from_time_t(1234567890);
-
-  // Simple edge cases.
-  EXPECT_TRUE(parse("", "", tz, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(0), tp);  // everything defaulted
-  EXPECT_TRUE(parse(" ", " ", tz, &tp));
-  EXPECT_TRUE(parse("  ", "  ", tz, &tp));
-  EXPECT_TRUE(parse("x", "x", tz, &tp));
-  EXPECT_TRUE(parse("xxx", "xxx", tz, &tp));
-
-  EXPECT_TRUE(
-      parse("%Y-%m-%d %H:%M:%S %z", "2013-06-28 19:08:09 -0800", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 29, 3, 8, 9, 0, false, "UTC");
-}
-
-TEST(Parse, WithTimeZone) {
-  time_zone tz;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz));
-  time_point<chrono::nanoseconds> tp;
-
-  // We can parse a string without a UTC offset if we supply a timezone.
-  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2013-06-28 19:08:09", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 19, 8, 9, -7 * 60 * 60, true, "PDT");
-
-  // But the timezone is ignored when a UTC offset is present.
-  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S %z", "2013-06-28 19:08:09 +0800",
-                    utc_time_zone(), &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 19 - 8 - 7, 8, 9, -7 * 60 * 60, true, "PDT");
-
-  // Check a skipped time (a Spring DST transition). parse() uses the
-  // pre-transition offset.
-  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2011-03-13 02:15:00", tz, &tp));
-  ExpectTime(tp, tz, 2011, 3, 13, 3, 15, 0, -7 * 60 * 60, true, "PDT");
-
-  // Check a repeated time (a Fall DST transition).  parse() uses the
-  // pre-transition offset.
-  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2011-11-06 01:15:00", tz, &tp));
-  ExpectTime(tp, tz, 2011, 11, 6, 1, 15, 0, -7 * 60 * 60, true, "PDT");
-}
-
-TEST(Parse, LeapSecond) {
-  time_zone tz;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz));
-  time_point<chrono::nanoseconds> tp;
-
-  // ":59" -> ":59"
-  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:59-08:00", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 8, 8, 59, -7 * 60 * 60, true, "PDT");
-
-  // ":59.5" -> ":59.5"
-  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:59.5-08:00", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 8, 8, 59, -7 * 60 * 60, true, "PDT");
-
-  // ":60" -> ":00"
-  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:60-08:00", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 8, 9, 0, -7 * 60 * 60, true, "PDT");
-
-  // ":60.5" -> ":00.0"
-  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:60.5-08:00", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 8, 9, 0, -7 * 60 * 60, true, "PDT");
-
-  // ":61" -> error
-  EXPECT_FALSE(parse(RFC3339_full, "2013-06-28T07:08:61-08:00", tz, &tp));
-}
-
-TEST(Parse, ErrorCases) {
-  const time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-
-  // Illegal trailing data.
-  EXPECT_FALSE(parse("%S", "123", tz, &tp));
-
-  // Can't parse an illegal format specifier.
-  EXPECT_FALSE(parse("%Q", "x", tz, &tp));
-
-  // Fails because of trailing, unparsed data "blah".
-  EXPECT_FALSE(parse("%m-%d", "2-3 blah", tz, &tp));
-
-  // Trailing whitespace is allowed.
-  EXPECT_TRUE(parse("%m-%d", "2-3  ", tz, &tp));
-  EXPECT_EQ(2, convert(tp, utc_time_zone()).month());
-  EXPECT_EQ(3, convert(tp, utc_time_zone()).day());
-
-  // Feb 31 requires normalization.
-  EXPECT_FALSE(parse("%m-%d", "2-31", tz, &tp));
-
-  // Check that we cannot have spaces in UTC offsets.
-  EXPECT_TRUE(parse("%z", "-0203", tz, &tp));
-  EXPECT_FALSE(parse("%z", "- 2 3", tz, &tp));
-  EXPECT_TRUE(parse("%Ez", "-02:03", tz, &tp));
-  EXPECT_FALSE(parse("%Ez", "- 2: 3", tz, &tp));
-
-  // Check that we reject other malformed UTC offsets.
-  EXPECT_FALSE(parse("%Ez", "+-08:00", tz, &tp));
-  EXPECT_FALSE(parse("%Ez", "-+08:00", tz, &tp));
-
-  // Check that we do not accept "-0" in fields that allow zero.
-  EXPECT_FALSE(parse("%Y", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%E4Y", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%H", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%M", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%S", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%z", "+-000", tz, &tp));
-  EXPECT_FALSE(parse("%Ez", "+-0:00", tz, &tp));
-  EXPECT_FALSE(parse("%z", "-00-0", tz, &tp));
-  EXPECT_FALSE(parse("%Ez", "-00:-0", tz, &tp));
-}
-
-TEST(Parse, PosixConversions) {
-  time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-  const auto reset = convert(civil_second(1977, 6, 28, 9, 8, 7), tz);
-
-  tp = reset;
-  EXPECT_TRUE(parse("%d", "15", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).day());
-
-  // %e is an extension, but is supported internally.
-  tp = reset;
-  EXPECT_TRUE(parse("%e", "15", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).day());  // Equivalent to %d
-
-  tp = reset;
-  EXPECT_TRUE(parse("%H", "17", tz, &tp));
-  EXPECT_EQ(17, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%I", "5", tz, &tp));
-  EXPECT_EQ(5, convert(tp, tz).hour());
-
-  // %j is parsed but ignored.
-  EXPECT_TRUE(parse("%j", "32", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%m", "11", tz, &tp));
-  EXPECT_EQ(11, convert(tp, tz).month());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%M", "33", tz, &tp));
-  EXPECT_EQ(33, convert(tp, tz).minute());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%S", "55", tz, &tp));
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  // %U is parsed but ignored.
-  EXPECT_TRUE(parse("%U", "15", tz, &tp));
-
-  // %w is parsed but ignored.
-  EXPECT_TRUE(parse("%w", "2", tz, &tp));
-
-  // %W is parsed but ignored.
-  EXPECT_TRUE(parse("%W", "22", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%y", "04", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Y", "2004", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  EXPECT_TRUE(parse("%%", "%", tz, &tp));
-
-#if defined(__linux__)
-  // SU/C99/TZ extensions
-
-  // Because we handle each (non-internal) specifier in a separate call
-  // to strptime(), there is no way to group %C and %y together.  So we
-  // just skip the %C/%y case.
-#if 0
-  tp = reset;
-  EXPECT_TRUE(parse("%C %y", "20 04", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-#endif
-
-  tp = reset;
-  EXPECT_TRUE(parse("%D", "02/03/04", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());
-  EXPECT_EQ(3, convert(tp, tz).day());
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  EXPECT_TRUE(parse("%n", "\n", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%R", "03:44", tz, &tp));
-  EXPECT_EQ(3, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-
-  EXPECT_TRUE(parse("%t", "\t\v\f\n\r ", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%T", "03:44:55", tz, &tp));
-  EXPECT_EQ(3, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%s", "1234567890", tz, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp);
-
-  // %s conversion, like %z/%Ez, pays no heed to the optional zone.
-  time_zone lax;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &lax));
-  tp = reset;
-  EXPECT_TRUE(parse("%s", "1234567890", lax, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp);
-
-  // This is most important when the time has the same YMDhms
-  // breakdown in the zone as some other time.  For example, ...
-  //  1414917000 in US/Pacific -> Sun Nov 2 01:30:00 2014 (PDT)
-  //  1414920600 in US/Pacific -> Sun Nov 2 01:30:00 2014 (PST)
-  tp = reset;
-  EXPECT_TRUE(parse("%s", "1414917000", lax, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(1414917000), tp);
-  tp = reset;
-  EXPECT_TRUE(parse("%s", "1414920600", lax, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(1414920600), tp);
-#endif
-}
-
-TEST(Parse, LocaleSpecific) {
-  time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-  const auto reset = convert(civil_second(1977, 6, 28, 9, 8, 7), tz);
-
-  // %a is parsed but ignored.
-  EXPECT_TRUE(parse("%a", "Mon", tz, &tp));
-
-  // %A is parsed but ignored.
-  EXPECT_TRUE(parse("%A", "Monday", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%b", "Feb", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%B", "February", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());
-
-  // %p is parsed but ignored if it's alone.  But it's used with %I.
-  EXPECT_TRUE(parse("%p", "AM", tz, &tp));
-  tp = reset;
-  EXPECT_TRUE(parse("%I %p", "5 PM", tz, &tp));
-  EXPECT_EQ(17, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%x", "02/03/04", tz, &tp));
-  if (convert(tp, tz).month() == 2) {
-    EXPECT_EQ(3, convert(tp, tz).day());
-  } else {
-    EXPECT_EQ(2, convert(tp, tz).day());
-    EXPECT_EQ(3, convert(tp, tz).month());
-  }
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%X", "15:44:55", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-#if defined(__linux__)
-  // SU/C99/TZ extensions
-
-  tp = reset;
-  EXPECT_TRUE(parse("%h", "Feb", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());  // Equivalent to %b
-
-  tp = reset;
-  EXPECT_TRUE(parse("%l %p", "5 PM", tz, &tp));
-  EXPECT_EQ(17, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%r", "03:44:55 PM", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Ec", "Tue Nov 19 05:06:07 2013", tz, &tp));
-  EXPECT_EQ(convert(civil_second(2013, 11, 19, 5, 6, 7), tz), tp);
-
-  // Modified conversion specifiers %E_
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Ex", "02/03/04", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());
-  EXPECT_EQ(3, convert(tp, tz).day());
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%EX", "15:44:55", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  // %Ey, the year offset from %EC, doesn't really make sense alone as there
-  // is no way to represent it in tm_year (%EC is not simply the century).
-  // Yet, because we handle each (non-internal) specifier in a separate call
-  // to strptime(), there is no way to group %EC and %Ey either.  So we just
-  // skip the %EC and %Ey cases.
-
-  tp = reset;
-  EXPECT_TRUE(parse("%EY", "2004", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  // Modified conversion specifiers %O_
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Od", "15", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).day());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Oe", "15", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).day());  // Equivalent to %d
-
-  tp = reset;
-  EXPECT_TRUE(parse("%OH", "17", tz, &tp));
-  EXPECT_EQ(17, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%OI", "5", tz, &tp));
-  EXPECT_EQ(5, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Om", "11", tz, &tp));
-  EXPECT_EQ(11, convert(tp, tz).month());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%OM", "33", tz, &tp));
-  EXPECT_EQ(33, convert(tp, tz).minute());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%OS", "55", tz, &tp));
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  // %OU is parsed but ignored.
-  EXPECT_TRUE(parse("%OU", "15", tz, &tp));
-
-  // %Ow is parsed but ignored.
-  EXPECT_TRUE(parse("%Ow", "2", tz, &tp));
-
-  // %OW is parsed but ignored.
-  EXPECT_TRUE(parse("%OW", "22", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Oy", "04", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-#endif
-}
-
-TEST(Parse, ExtendedSeconds) {
-  const time_zone tz = utc_time_zone();
-  const time_point<chrono::nanoseconds> unix_epoch =
-      chrono::system_clock::from_time_t(0);
-
-  // All %E<prec>S cases are treated the same as %E*S on input.
-  auto precisions = {"*", "0", "1",  "2",  "3",  "4",  "5",  "6", "7",
-                     "8", "9", "10", "11", "12", "13", "14", "15"};
-  for (const std::string& prec : precisions) {
-    const std::string fmt = "%E" + prec + "S";
-    SCOPED_TRACE(fmt);
-    time_point<chrono::nanoseconds> tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "5", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.0", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.00", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.6", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.60", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.600", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.67", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(670), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.670", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(670), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.678", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(678), tp);
-  }
-
-  // Here is a "%E*S" case we got wrong for a while.  The fractional
-  // part of the first instant is less than 2^31 and was correctly
-  // parsed, while the second (and any subsecond field >=2^31) failed.
-  time_point<chrono::nanoseconds> tp = unix_epoch;
-  EXPECT_TRUE(parse("%E*S", "0.2147483647", tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-  tp = unix_epoch;
-  EXPECT_TRUE(parse("%E*S", "0.2147483648", tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-
-  // We should also be able to specify long strings of digits far
-  // beyond the current resolution and have them convert the same way.
-  tp = unix_epoch;
-  EXPECT_TRUE(parse(
-      "%E*S", "0.214748364801234567890123456789012345678901234567890123456789",
-      tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-}
-
-TEST(Parse, ExtendedSecondsScan) {
-  const time_zone tz = utc_time_zone();
-  time_point<chrono::nanoseconds> tp;
-  for (int ms = 0; ms < 1000; ms += 111) {
-    for (int us = 0; us < 1000; us += 27) {
-      const int micros = ms * 1000 + us;
-      for (int ns = 0; ns < 1000; ns += 9) {
-        const auto expected = chrono::system_clock::from_time_t(0) +
-                              chrono::nanoseconds(micros * 1000 + ns);
-        std::ostringstream oss;
-        oss << "0." << std::setfill('0') << std::setw(3);
-        oss << ms << std::setw(3) << us << std::setw(3) << ns;
-        const std::string input = oss.str();
-        EXPECT_TRUE(parse("%E*S", input, tz, &tp));
-        EXPECT_EQ(expected, tp) << input;
-      }
-    }
-  }
-}
-
-TEST(Parse, ExtendedSubeconds) {
-  const time_zone tz = utc_time_zone();
-  const time_point<chrono::nanoseconds> unix_epoch =
-      chrono::system_clock::from_time_t(0);
-
-  // All %E<prec>f cases are treated the same as %E*f on input.
-  auto precisions = {"*", "0", "1",  "2",  "3",  "4",  "5",  "6", "7",
-                     "8", "9", "10", "11", "12", "13", "14", "15"};
-  for (const std::string& prec : precisions) {
-    const std::string fmt = "%E" + prec + "f";
-    SCOPED_TRACE(fmt);
-    time_point<chrono::nanoseconds> tp = unix_epoch - chrono::seconds(1);
-    EXPECT_TRUE(parse(fmt, "", tz, &tp));
-    EXPECT_EQ(unix_epoch, tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "6", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "60", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "600", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "67", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(670), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "670", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(670), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "678", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(678), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "6789", tz, &tp));
-    EXPECT_EQ(
-        unix_epoch + chrono::milliseconds(678) + chrono::microseconds(900), tp);
-  }
-
-  // Here is a "%E*f" case we got wrong for a while.  The fractional
-  // part of the first instant is less than 2^31 and was correctly
-  // parsed, while the second (and any subsecond field >=2^31) failed.
-  time_point<chrono::nanoseconds> tp = unix_epoch;
-  EXPECT_TRUE(parse("%E*f", "2147483647", tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-  tp = unix_epoch;
-  EXPECT_TRUE(parse("%E*f", "2147483648", tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-
-  // We should also be able to specify long strings of digits far
-  // beyond the current resolution and have them convert the same way.
-  tp = unix_epoch;
-  EXPECT_TRUE(parse(
-      "%E*f", "214748364801234567890123456789012345678901234567890123456789",
-      tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-}
-
-TEST(Parse, ExtendedSubecondsScan) {
-  time_point<chrono::nanoseconds> tp;
-  const time_zone tz = utc_time_zone();
-  for (int ms = 0; ms < 1000; ms += 111) {
-    for (int us = 0; us < 1000; us += 27) {
-      const int micros = ms * 1000 + us;
-      for (int ns = 0; ns < 1000; ns += 9) {
-        std::ostringstream oss;
-        oss << std::setfill('0') << std::setw(3) << ms;
-        oss << std::setw(3) << us << std::setw(3) << ns;
-        const std::string nanos = oss.str();
-        const auto expected = chrono::system_clock::from_time_t(0) +
-                              chrono::nanoseconds(micros * 1000 + ns);
-        for (int ps = 0; ps < 1000; ps += 250) {
-          std::ostringstream ps_oss;
-          oss << std::setfill('0') << std::setw(3) << ps;
-          const std::string input = nanos + ps_oss.str() + "999";
-          EXPECT_TRUE(parse("%E*f", input, tz, &tp));
-          EXPECT_EQ(expected + chrono::nanoseconds(ps) / 1000, tp) << input;
-        }
-      }
-    }
-  }
-}
-
-TEST(Parse, ExtendedOffset) {
-  const time_zone utc = utc_time_zone();
-  time_point<cctz::seconds> tp;
-
-  EXPECT_TRUE(parse("%Ez", "+00:00", utc, &tp));
-  EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse("%Ez", "-12:34", utc, &tp));
-  EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp);
-  EXPECT_TRUE(parse("%Ez", "+12:34", utc, &tp));
-  EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp);
-  EXPECT_FALSE(parse("%Ez", "-12:3", utc, &tp));
-
-  for (auto fmt : {"%Ez", "%z"}) {
-    EXPECT_TRUE(parse(fmt, "+0000", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-1234", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+1234", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-123", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+00", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-12", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+12", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 12, 0, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-1", utc, &tp));
-  }
-}
-
-TEST(Parse, ExtendedSecondOffset) {
-  const time_zone utc = utc_time_zone();
-  time_point<cctz::seconds> tp;
-
-  for (auto fmt : {"%Ez", "%E*z", "%:z", "%::z", "%:::z"}) {
-    EXPECT_TRUE(parse(fmt, "+00:00:00", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-12:34:56", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 56), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+12:34:56", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 25, 4), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-12:34:5", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+000000", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-123456", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 56), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+123456", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 25, 4), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-12345", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+00:00", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-12:34", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+12:34", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-12:3", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+0000", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-1234", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+1234", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-123", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+00", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-12", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+12", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 12, 0, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-1", utc, &tp));
-  }
-}
-
-TEST(Parse, ExtendedYears) {
-  const time_zone utc = utc_time_zone();
-  const char e4y_fmt[] = "%E4Y%m%d";  // no separators
-  time_point<cctz::seconds> tp;
-
-  // %E4Y consumes exactly four chars, including any sign.
-  EXPECT_TRUE(parse(e4y_fmt, "-9991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(-999, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "-0991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(-99, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "-0091127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(-9, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "-0011127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(-1, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "00001127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(0, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "00011127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(1, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "00091127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(9, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "00991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(99, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "09991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(999, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "99991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(9999, 11, 27, 0, 0, 0), utc), tp);
-
-  // When the year is outside [-999:9999], the parse fails.
-  EXPECT_FALSE(parse(e4y_fmt, "-10001127", utc, &tp));
-  EXPECT_FALSE(parse(e4y_fmt, "100001127", utc, &tp));
-}
-
-TEST(Parse, RFC3339Format) {
-  const time_zone tz = utc_time_zone();
-  time_point<chrono::nanoseconds> tp;
-  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00+00:00", tz, &tp));
-  ExpectTime(tp, tz, 2014, 2, 12, 20, 21, 0, 0, false, "UTC");
-
-  // Check that %ET also accepts "t".
-  time_point<chrono::nanoseconds> tp2;
-  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12t20:21:00+00:00", tz, &tp2));
-  EXPECT_EQ(tp, tp2);
-
-  // Check that %Ez also accepts "Z" as a synonym for "+00:00".
-  time_point<chrono::nanoseconds> tp3;
-  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00Z", tz, &tp3));
-  EXPECT_EQ(tp, tp3);
-
-  // Check that %Ez also accepts "z" as a synonym for "+00:00".
-  time_point<chrono::nanoseconds> tp4;
-  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00z", tz, &tp4));
-  EXPECT_EQ(tp, tp4);
-}
-
-TEST(Parse, Week) {
-  const time_zone utc = utc_time_zone();
-  time_point<cctz::seconds> tp;
-
-  auto exp = convert(civil_second(2017, 1, 1, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2017-01-7", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2017-00-0", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2017, 12, 31, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2017-53-7", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2017-52-0", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2018, 1, 1, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2018-00-1", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2018-01-1", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2018, 12, 31, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2018-52-1", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2018-53-1", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2019, 1, 1, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2019-00-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2019-00-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2019-52-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2019-52-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-}
-
-TEST(Parse, WeekYearShift) {
-  // %U/%W conversions with week values in {0, 52, 53} can slip
-  // into the previous/following calendar years.
-  const time_zone utc = utc_time_zone();
-  time_point<cctz::seconds> tp;
-
-  auto exp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2020-00-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2020-00-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2021, 1, 1, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2020-52-5", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2020-52-5", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  // Slipping into the previous/following calendar years should fail when
-  // we're already at the extremes.
-  EXPECT_FALSE(parse("%Y-%U-%u", "-9223372036854775808-0-7", utc, &tp));
-  EXPECT_FALSE(parse("%Y-%U-%u", "9223372036854775807-53-7", utc, &tp));
-}
-
-TEST(Parse, MaxRange) {
-  const time_zone utc = utc_time_zone();
-  time_point<cctz::seconds> tp;
-
-  // tests the upper limit using +00:00 offset
-  EXPECT_TRUE(
-      parse(RFC3339_sec, "292277026596-12-04T15:30:07+00:00", utc, &tp));
-  EXPECT_EQ(tp, time_point<cctz::seconds>::max());
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "292277026596-12-04T15:30:08+00:00", utc, &tp));
-
-  // tests the upper limit using -01:00 offset
-  EXPECT_TRUE(
-      parse(RFC3339_sec, "292277026596-12-04T14:30:07-01:00", utc, &tp));
-  EXPECT_EQ(tp, time_point<cctz::seconds>::max());
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "292277026596-12-04T15:30:07-01:00", utc, &tp));
-
-  // tests the lower limit using +00:00 offset
-  EXPECT_TRUE(
-      parse(RFC3339_sec, "-292277022657-01-27T08:29:52+00:00", utc, &tp));
-  EXPECT_EQ(tp, time_point<cctz::seconds>::min());
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "-292277022657-01-27T08:29:51+00:00", utc, &tp));
-
-  // tests the lower limit using +01:00 offset
-  EXPECT_TRUE(
-      parse(RFC3339_sec, "-292277022657-01-27T09:29:52+01:00", utc, &tp));
-  EXPECT_EQ(tp, time_point<cctz::seconds>::min());
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "-292277022657-01-27T08:29:51+01:00", utc, &tp));
-
-  // tests max/min civil-second overflow
-  EXPECT_FALSE(parse(RFC3339_sec, "9223372036854775807-12-31T23:59:59-00:01",
-                     utc, &tp));
-  EXPECT_FALSE(parse(RFC3339_sec, "-9223372036854775808-01-01T00:00:00+00:01",
-                     utc, &tp));
-
-  // TODO: Add tests that parsing times with fractional seconds overflow
-  // appropriately. This can't be done until cctz::parse() properly detects
-  // overflow when combining the chrono seconds and femto.
-}
-
-//
-// Roundtrip test for format()/parse().
-//
-
-TEST(FormatParse, RoundTrip) {
-  time_zone lax;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &lax));
-  const auto in = convert(civil_second(1977, 6, 28, 9, 8, 7), lax);
-  const auto subseconds = chrono::nanoseconds(654321);
-
-  // RFC3339, which renders subseconds.
-  {
-    time_point<chrono::nanoseconds> out;
-    const std::string s = format(RFC3339_full, in + subseconds, lax);
-    EXPECT_TRUE(parse(RFC3339_full, s, lax, &out)) << s;
-    EXPECT_EQ(in + subseconds, out);  // RFC3339_full includes %Ez
-  }
-
-  // RFC1123, which only does whole seconds.
-  {
-    time_point<chrono::nanoseconds> out;
-    const std::string s = format(RFC1123_full, in, lax);
-    EXPECT_TRUE(parse(RFC1123_full, s, lax, &out)) << s;
-    EXPECT_EQ(in, out);  // RFC1123_full includes %z
-  }
-
-#if defined(_WIN32) || defined(_WIN64)
-  // Initial investigations indicate the %c does not roundtrip on Windows.
-  // TODO: Figure out what is going on here (perhaps a locale problem).
-#else
-  // Even though we don't know what %c will produce, it should roundtrip,
-  // but only in the 0-offset timezone.
-  {
-    time_point<chrono::nanoseconds> out;
-    time_zone utc = utc_time_zone();
-    const std::string s = format("%c", in, utc);
-    EXPECT_TRUE(parse("%c", s, utc, &out)) << s;
-    EXPECT_EQ(in, out);
-  }
-#endif
-}
-
-TEST(FormatParse, RoundTripDistantFuture) {
-  const time_zone utc = utc_time_zone();
-  const time_point<cctz::seconds> in = time_point<cctz::seconds>::max();
-  const std::string s = format(RFC3339_full, in, utc);
-  time_point<cctz::seconds> out;
-  EXPECT_TRUE(parse(RFC3339_full, s, utc, &out)) << s;
-  EXPECT_EQ(in, out);
-}
-
-TEST(FormatParse, RoundTripDistantPast) {
-  const time_zone utc = utc_time_zone();
-  const time_point<cctz::seconds> in = time_point<cctz::seconds>::min();
-  const std::string s = format(RFC3339_full, in, utc);
-  time_point<cctz::seconds> out;
-  EXPECT_TRUE(parse(RFC3339_full, s, utc, &out)) << s;
-  EXPECT_EQ(in, out);
-}
-
-}  // namespace cctz
+// Copyright 2016 Google Inc. All Rights Reserved. 
+// 
+// Licensed under the Apache License, Version 2.0 (the "License"); 
+// you may not use this file except in compliance with the License. 
+// You may obtain a copy of the License at 
+// 
+//   https://www.apache.org/licenses/LICENSE-2.0 
+// 
+//   Unless required by applicable law or agreed to in writing, software 
+//   distributed under the License is distributed on an "AS IS" BASIS, 
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+//   See the License for the specific language governing permissions and 
+//   limitations under the License. 
+ 
+#include "cctz/time_zone.h" 
+ 
+#include <chrono> 
+#include <iomanip> 
+#include <sstream> 
+#include <string> 
+ 
+#include "cctz/civil_time.h" 
+#include "gmock/gmock.h" 
+#include "gtest/gtest.h" 
+ 
+namespace chrono = std::chrono; 
+ 
+namespace cctz { 
+ 
+namespace { 
+ 
+// This helper is a macro so that failed expectations show up with the 
+// correct line numbers. 
+#define ExpectTime(tp, tz, y, m, d, hh, mm, ss, off, isdst, zone) \ 
+  do {                                                            \ 
+    time_zone::absolute_lookup al = tz.lookup(tp);                \ 
+    EXPECT_EQ(y, al.cs.year());                                   \ 
+    EXPECT_EQ(m, al.cs.month());                                  \ 
+    EXPECT_EQ(d, al.cs.day());                                    \ 
+    EXPECT_EQ(hh, al.cs.hour());                                  \ 
+    EXPECT_EQ(mm, al.cs.minute());                                \ 
+    EXPECT_EQ(ss, al.cs.second());                                \ 
+    EXPECT_EQ(off, al.offset);                                    \ 
+    EXPECT_TRUE(isdst == al.is_dst);                              \ 
+    EXPECT_STREQ(zone, al.abbr);                                  \ 
+  } while (0) 
+ 
+const char RFC3339_full[] = "%Y-%m-%d%ET%H:%M:%E*S%Ez"; 
+const char RFC3339_sec[] =  "%Y-%m-%d%ET%H:%M:%S%Ez"; 
+ 
+const char RFC1123_full[] = "%a, %d %b %Y %H:%M:%S %z"; 
+const char RFC1123_no_wday[] =  "%d %b %Y %H:%M:%S %z"; 
+ 
+// A helper that tests the given format specifier by itself, and with leading 
+// and trailing characters.  For example: TestFormatSpecifier(tp, "%a", "Thu"). 
+template <typename D> 
+void TestFormatSpecifier(time_point<D> tp, time_zone tz, const std::string& fmt, 
+                         const std::string& ans) { 
+  EXPECT_EQ(ans, format(fmt, tp, tz)) << fmt; 
+  EXPECT_EQ("xxx " + ans, format("xxx " + fmt, tp, tz)); 
+  EXPECT_EQ(ans + " yyy", format(fmt + " yyy", tp, tz)); 
+  EXPECT_EQ("xxx " + ans + " yyy", format("xxx " + fmt + " yyy", tp, tz)); 
+} 
+ 
+}  // namespace 
+ 
+// 
+// Testing format() 
+// 
+ 
+TEST(Format, TimePointResolution) { 
+  const char kFmt[] = "%H:%M:%E*S"; 
+  const time_zone utc = utc_time_zone(); 
+  const time_point<chrono::nanoseconds> t0 = 
+      chrono::system_clock::from_time_t(1420167845) + 
+      chrono::milliseconds(123) + chrono::microseconds(456) + 
+      chrono::nanoseconds(789); 
+  EXPECT_EQ( 
+      "03:04:05.123456789", 
+      format(kFmt, chrono::time_point_cast<chrono::nanoseconds>(t0), utc)); 
+  EXPECT_EQ( 
+      "03:04:05.123456", 
+      format(kFmt, chrono::time_point_cast<chrono::microseconds>(t0), utc)); 
+  EXPECT_EQ( 
+      "03:04:05.123", 
+      format(kFmt, chrono::time_point_cast<chrono::milliseconds>(t0), utc)); 
+  EXPECT_EQ("03:04:05", 
+            format(kFmt, chrono::time_point_cast<chrono::seconds>(t0), utc)); 
+  EXPECT_EQ("03:04:05", 
+            format(kFmt, chrono::time_point_cast<cctz::seconds>(t0), utc)); 
+  EXPECT_EQ("03:04:00", 
+            format(kFmt, chrono::time_point_cast<chrono::minutes>(t0), utc)); 
+  EXPECT_EQ("03:00:00", 
+            format(kFmt, chrono::time_point_cast<chrono::hours>(t0), utc)); 
+} 
+ 
+TEST(Format, TimePointExtendedResolution) { 
+  const char kFmt[] = "%H:%M:%E*S"; 
+  const time_zone utc = utc_time_zone(); 
+  const time_point<cctz::seconds> tp = 
+      chrono::time_point_cast<cctz::seconds>( 
+          chrono::system_clock::from_time_t(0)) + 
+      chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56); 
+ 
+  EXPECT_EQ( 
+      "12:34:56.123456789012345", 
+      detail::format(kFmt, tp, detail::femtoseconds(123456789012345), utc)); 
+  EXPECT_EQ( 
+      "12:34:56.012345678901234", 
+      detail::format(kFmt, tp, detail::femtoseconds(12345678901234), utc)); 
+  EXPECT_EQ( 
+      "12:34:56.001234567890123", 
+      detail::format(kFmt, tp, detail::femtoseconds(1234567890123), utc)); 
+  EXPECT_EQ( 
+      "12:34:56.000123456789012", 
+      detail::format(kFmt, tp, detail::femtoseconds(123456789012), utc)); 
+ 
+  EXPECT_EQ("12:34:56.000000000000123", 
+            detail::format(kFmt, tp, detail::femtoseconds(123), utc)); 
+  EXPECT_EQ("12:34:56.000000000000012", 
+            detail::format(kFmt, tp, detail::femtoseconds(12), utc)); 
+  EXPECT_EQ("12:34:56.000000000000001", 
+            detail::format(kFmt, tp, detail::femtoseconds(1), utc)); 
+} 
+ 
+TEST(Format, Basics) { 
+  time_zone tz = utc_time_zone(); 
+  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0); 
+ 
+  // Starts with a couple basic edge cases. 
+  EXPECT_EQ("", format("", tp, tz)); 
+  EXPECT_EQ(" ", format(" ", tp, tz)); 
+  EXPECT_EQ("  ", format("  ", tp, tz)); 
+  EXPECT_EQ("xxx", format("xxx", tp, tz)); 
+  std::string big(128, 'x'); 
+  EXPECT_EQ(big, format(big, tp, tz)); 
+  // Cause the 1024-byte buffer to grow. 
+  std::string bigger(100000, 'x'); 
+  EXPECT_EQ(bigger, format(bigger, tp, tz)); 
+ 
+  tp += chrono::hours(13) + chrono::minutes(4) + chrono::seconds(5); 
+  tp += chrono::milliseconds(6) + chrono::microseconds(7) + 
+        chrono::nanoseconds(8); 
+  EXPECT_EQ("1970-01-01", format("%Y-%m-%d", tp, tz)); 
+  EXPECT_EQ("13:04:05", format("%H:%M:%S", tp, tz)); 
+  EXPECT_EQ("13:04:05.006", format("%H:%M:%E3S", tp, tz)); 
+  EXPECT_EQ("13:04:05.006007", format("%H:%M:%E6S", tp, tz)); 
+  EXPECT_EQ("13:04:05.006007008", format("%H:%M:%E9S", tp, tz)); 
+} 
+ 
+TEST(Format, PosixConversions) { 
+  const time_zone tz = utc_time_zone(); 
+  auto tp = chrono::system_clock::from_time_t(0); 
+ 
+  TestFormatSpecifier(tp, tz, "%d", "01"); 
+  TestFormatSpecifier(tp, tz, "%e", " 1");  // extension but internal support 
+  TestFormatSpecifier(tp, tz, "%H", "00"); 
+  TestFormatSpecifier(tp, tz, "%I", "12"); 
+  TestFormatSpecifier(tp, tz, "%j", "001"); 
+  TestFormatSpecifier(tp, tz, "%m", "01"); 
+  TestFormatSpecifier(tp, tz, "%M", "00"); 
+  TestFormatSpecifier(tp, tz, "%S", "00"); 
+  TestFormatSpecifier(tp, tz, "%U", "00"); 
+  TestFormatSpecifier(tp, tz, "%w", "4");  // 4=Thursday 
+  TestFormatSpecifier(tp, tz, "%W", "00"); 
+  TestFormatSpecifier(tp, tz, "%y", "70"); 
+  TestFormatSpecifier(tp, tz, "%Y", "1970"); 
+  TestFormatSpecifier(tp, tz, "%z", "+0000"); 
+  TestFormatSpecifier(tp, tz, "%Z", "UTC"); 
+  TestFormatSpecifier(tp, tz, "%%", "%"); 
+ 
+#if defined(__linux__) 
+  // SU/C99/TZ extensions 
+  TestFormatSpecifier(tp, tz, "%C", "19"); 
+  TestFormatSpecifier(tp, tz, "%D", "01/01/70"); 
+  TestFormatSpecifier(tp, tz, "%F", "1970-01-01"); 
+  TestFormatSpecifier(tp, tz, "%g", "70"); 
+  TestFormatSpecifier(tp, tz, "%G", "1970"); 
+  TestFormatSpecifier(tp, tz, "%k", " 0"); 
+  TestFormatSpecifier(tp, tz, "%l", "12"); 
+  TestFormatSpecifier(tp, tz, "%n", "\n"); 
+  TestFormatSpecifier(tp, tz, "%R", "00:00"); 
+  TestFormatSpecifier(tp, tz, "%t", "\t"); 
+  TestFormatSpecifier(tp, tz, "%T", "00:00:00"); 
+  TestFormatSpecifier(tp, tz, "%u", "4");  // 4=Thursday 
+  TestFormatSpecifier(tp, tz, "%V", "01"); 
+  TestFormatSpecifier(tp, tz, "%s", "0"); 
+#endif 
+} 
+ 
+TEST(Format, LocaleSpecific) { 
+  const time_zone tz = utc_time_zone(); 
+  auto tp = chrono::system_clock::from_time_t(0); 
+ 
+  TestFormatSpecifier(tp, tz, "%a", "Thu"); 
+  TestFormatSpecifier(tp, tz, "%A", "Thursday"); 
+  TestFormatSpecifier(tp, tz, "%b", "Jan"); 
+  TestFormatSpecifier(tp, tz, "%B", "January"); 
+ 
+  // %c should at least produce the numeric year and time-of-day. 
+  const std::string s = format("%c", tp, utc_time_zone()); 
+  EXPECT_THAT(s, testing::HasSubstr("1970")); 
+  EXPECT_THAT(s, testing::HasSubstr("00:00:00")); 
+ 
+  TestFormatSpecifier(tp, tz, "%p", "AM"); 
+  TestFormatSpecifier(tp, tz, "%x", "01/01/70"); 
+  TestFormatSpecifier(tp, tz, "%X", "00:00:00"); 
+ 
+#if defined(__linux__) 
+  // SU/C99/TZ extensions 
+  TestFormatSpecifier(tp, tz, "%h", "Jan");  // Same as %b 
+  TestFormatSpecifier(tp, tz, "%P", "am"); 
+  TestFormatSpecifier(tp, tz, "%r", "12:00:00 AM"); 
+ 
+  // Modified conversion specifiers %E_ 
+  TestFormatSpecifier(tp, tz, "%Ec", "Thu Jan  1 00:00:00 1970"); 
+  TestFormatSpecifier(tp, tz, "%EC", "19"); 
+  TestFormatSpecifier(tp, tz, "%Ex", "01/01/70"); 
+  TestFormatSpecifier(tp, tz, "%EX", "00:00:00"); 
+  TestFormatSpecifier(tp, tz, "%Ey", "70"); 
+  TestFormatSpecifier(tp, tz, "%EY", "1970"); 
+ 
+  // Modified conversion specifiers %O_ 
+  TestFormatSpecifier(tp, tz, "%Od", "01"); 
+  TestFormatSpecifier(tp, tz, "%Oe", " 1"); 
+  TestFormatSpecifier(tp, tz, "%OH", "00"); 
+  TestFormatSpecifier(tp, tz, "%OI", "12"); 
+  TestFormatSpecifier(tp, tz, "%Om", "01"); 
+  TestFormatSpecifier(tp, tz, "%OM", "00"); 
+  TestFormatSpecifier(tp, tz, "%OS", "00"); 
+  TestFormatSpecifier(tp, tz, "%Ou", "4");  // 4=Thursday 
+  TestFormatSpecifier(tp, tz, "%OU", "00"); 
+  TestFormatSpecifier(tp, tz, "%OV", "01"); 
+  TestFormatSpecifier(tp, tz, "%Ow", "4");  // 4=Thursday 
+  TestFormatSpecifier(tp, tz, "%OW", "00"); 
+  TestFormatSpecifier(tp, tz, "%Oy", "70"); 
+#endif 
+} 
+ 
+TEST(Format, Escaping) { 
+  const time_zone tz = utc_time_zone(); 
+  auto tp = chrono::system_clock::from_time_t(0); 
+ 
+  TestFormatSpecifier(tp, tz, "%%", "%"); 
+  TestFormatSpecifier(tp, tz, "%%a", "%a"); 
+  TestFormatSpecifier(tp, tz, "%%b", "%b"); 
+  TestFormatSpecifier(tp, tz, "%%Ea", "%Ea"); 
+  TestFormatSpecifier(tp, tz, "%%Es", "%Es"); 
+  TestFormatSpecifier(tp, tz, "%%E3S", "%E3S"); 
+  TestFormatSpecifier(tp, tz, "%%OS", "%OS"); 
+  TestFormatSpecifier(tp, tz, "%%O3S", "%O3S"); 
+ 
+  // Multiple levels of escaping. 
+  TestFormatSpecifier(tp, tz, "%%%Y", "%1970"); 
+  TestFormatSpecifier(tp, tz, "%%%E3S", "%00.000"); 
+  TestFormatSpecifier(tp, tz, "%%%%E3S", "%%E3S"); 
+} 
+ 
+TEST(Format, ExtendedSeconds) { 
+  const time_zone tz = utc_time_zone(); 
+ 
+  // No subseconds. 
+  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0); 
+  tp += chrono::seconds(5); 
+  EXPECT_EQ("05", format("%E*S", tp, tz)); 
+  EXPECT_EQ("05", format("%E0S", tp, tz)); 
+  EXPECT_EQ("05.0", format("%E1S", tp, tz)); 
+  EXPECT_EQ("05.00", format("%E2S", tp, tz)); 
+  EXPECT_EQ("05.000", format("%E3S", tp, tz)); 
+  EXPECT_EQ("05.0000", format("%E4S", tp, tz)); 
+  EXPECT_EQ("05.00000", format("%E5S", tp, tz)); 
+  EXPECT_EQ("05.000000", format("%E6S", tp, tz)); 
+  EXPECT_EQ("05.0000000", format("%E7S", tp, tz)); 
+  EXPECT_EQ("05.00000000", format("%E8S", tp, tz)); 
+  EXPECT_EQ("05.000000000", format("%E9S", tp, tz)); 
+  EXPECT_EQ("05.0000000000", format("%E10S", tp, tz)); 
+  EXPECT_EQ("05.00000000000", format("%E11S", tp, tz)); 
+  EXPECT_EQ("05.000000000000", format("%E12S", tp, tz)); 
+  EXPECT_EQ("05.0000000000000", format("%E13S", tp, tz)); 
+  EXPECT_EQ("05.00000000000000", format("%E14S", tp, tz)); 
+  EXPECT_EQ("05.000000000000000", format("%E15S", tp, tz)); 
+ 
+  // With subseconds. 
+  tp += chrono::milliseconds(6) + chrono::microseconds(7) + 
+        chrono::nanoseconds(8); 
+  EXPECT_EQ("05.006007008", format("%E*S", tp, tz)); 
+  EXPECT_EQ("05", format("%E0S", tp, tz)); 
+  EXPECT_EQ("05.0", format("%E1S", tp, tz)); 
+  EXPECT_EQ("05.00", format("%E2S", tp, tz)); 
+  EXPECT_EQ("05.006", format("%E3S", tp, tz)); 
+  EXPECT_EQ("05.0060", format("%E4S", tp, tz)); 
+  EXPECT_EQ("05.00600", format("%E5S", tp, tz)); 
+  EXPECT_EQ("05.006007", format("%E6S", tp, tz)); 
+  EXPECT_EQ("05.0060070", format("%E7S", tp, tz)); 
+  EXPECT_EQ("05.00600700", format("%E8S", tp, tz)); 
+  EXPECT_EQ("05.006007008", format("%E9S", tp, tz)); 
+  EXPECT_EQ("05.0060070080", format("%E10S", tp, tz)); 
+  EXPECT_EQ("05.00600700800", format("%E11S", tp, tz)); 
+  EXPECT_EQ("05.006007008000", format("%E12S", tp, tz)); 
+  EXPECT_EQ("05.0060070080000", format("%E13S", tp, tz)); 
+  EXPECT_EQ("05.00600700800000", format("%E14S", tp, tz)); 
+  EXPECT_EQ("05.006007008000000", format("%E15S", tp, tz)); 
+ 
+  // Times before the Unix epoch. 
+  tp = chrono::system_clock::from_time_t(0) + chrono::microseconds(-1); 
+  EXPECT_EQ("1969-12-31 23:59:59.999999", 
+            format("%Y-%m-%d %H:%M:%E*S", tp, tz)); 
+ 
+  // Here is a "%E*S" case we got wrong for a while.  While the first 
+  // instant below is correctly rendered as "...:07.333304", the second 
+  // one used to appear as "...:07.33330499999999999". 
+  tp = chrono::system_clock::from_time_t(0) + 
+       chrono::microseconds(1395024427333304); 
+  EXPECT_EQ("2014-03-17 02:47:07.333304", 
+            format("%Y-%m-%d %H:%M:%E*S", tp, tz)); 
+  tp += chrono::microseconds(1); 
+  EXPECT_EQ("2014-03-17 02:47:07.333305", 
+            format("%Y-%m-%d %H:%M:%E*S", tp, tz)); 
+} 
+ 
+TEST(Format, ExtendedSubeconds) { 
+  const time_zone tz = utc_time_zone(); 
+ 
+  // No subseconds. 
+  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0); 
+  tp += chrono::seconds(5); 
+  EXPECT_EQ("0", format("%E*f", tp, tz)); 
+  EXPECT_EQ("", format("%E0f", tp, tz)); 
+  EXPECT_EQ("0", format("%E1f", tp, tz)); 
+  EXPECT_EQ("00", format("%E2f", tp, tz)); 
+  EXPECT_EQ("000", format("%E3f", tp, tz)); 
+  EXPECT_EQ("0000", format("%E4f", tp, tz)); 
+  EXPECT_EQ("00000", format("%E5f", tp, tz)); 
+  EXPECT_EQ("000000", format("%E6f", tp, tz)); 
+  EXPECT_EQ("0000000", format("%E7f", tp, tz)); 
+  EXPECT_EQ("00000000", format("%E8f", tp, tz)); 
+  EXPECT_EQ("000000000", format("%E9f", tp, tz)); 
+  EXPECT_EQ("0000000000", format("%E10f", tp, tz)); 
+  EXPECT_EQ("00000000000", format("%E11f", tp, tz)); 
+  EXPECT_EQ("000000000000", format("%E12f", tp, tz)); 
+  EXPECT_EQ("0000000000000", format("%E13f", tp, tz)); 
+  EXPECT_EQ("00000000000000", format("%E14f", tp, tz)); 
+  EXPECT_EQ("000000000000000", format("%E15f", tp, tz)); 
+ 
+  // With subseconds. 
+  tp += chrono::milliseconds(6) + chrono::microseconds(7) + 
+        chrono::nanoseconds(8); 
+  EXPECT_EQ("006007008", format("%E*f", tp, tz)); 
+  EXPECT_EQ("", format("%E0f", tp, tz)); 
+  EXPECT_EQ("0", format("%E1f", tp, tz)); 
+  EXPECT_EQ("00", format("%E2f", tp, tz)); 
+  EXPECT_EQ("006", format("%E3f", tp, tz)); 
+  EXPECT_EQ("0060", format("%E4f", tp, tz)); 
+  EXPECT_EQ("00600", format("%E5f", tp, tz)); 
+  EXPECT_EQ("006007", format("%E6f", tp, tz)); 
+  EXPECT_EQ("0060070", format("%E7f", tp, tz)); 
+  EXPECT_EQ("00600700", format("%E8f", tp, tz)); 
+  EXPECT_EQ("006007008", format("%E9f", tp, tz)); 
+  EXPECT_EQ("0060070080", format("%E10f", tp, tz)); 
+  EXPECT_EQ("00600700800", format("%E11f", tp, tz)); 
+  EXPECT_EQ("006007008000", format("%E12f", tp, tz)); 
+  EXPECT_EQ("0060070080000", format("%E13f", tp, tz)); 
+  EXPECT_EQ("00600700800000", format("%E14f", tp, tz)); 
+  EXPECT_EQ("006007008000000", format("%E15f", tp, tz)); 
+ 
+  // Times before the Unix epoch. 
+  tp = chrono::system_clock::from_time_t(0) + chrono::microseconds(-1); 
+  EXPECT_EQ("1969-12-31 23:59:59.999999", 
+            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz)); 
+ 
+  // Here is a "%E*S" case we got wrong for a while.  While the first 
+  // instant below is correctly rendered as "...:07.333304", the second 
+  // one used to appear as "...:07.33330499999999999". 
+  tp = chrono::system_clock::from_time_t(0) + 
+       chrono::microseconds(1395024427333304); 
+  EXPECT_EQ("2014-03-17 02:47:07.333304", 
+            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz)); 
+  tp += chrono::microseconds(1); 
+  EXPECT_EQ("2014-03-17 02:47:07.333305", 
+            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz)); 
+} 
+ 
+TEST(Format, CompareExtendSecondsVsSubseconds) { 
+  const time_zone tz = utc_time_zone(); 
+ 
+  // This test case illustrates the differences/similarities between: 
+  //   fmt_A: %E<prec>S 
+  //   fmt_B: %S.%E<prec>f 
+  auto fmt_A = [](const std::string& prec) { return "%E" + prec + "S"; }; 
+  auto fmt_B = [](const std::string& prec) { return "%S.%E" + prec + "f"; }; 
+ 
+  // No subseconds: 
+  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0); 
+  tp += chrono::seconds(5); 
+  // ... %E*S and %S.%E*f are different. 
+  EXPECT_EQ("05", format(fmt_A("*"), tp, tz)); 
+  EXPECT_EQ("05.0", format(fmt_B("*"), tp, tz)); 
+  // ... %E0S and %S.%E0f are different. 
+  EXPECT_EQ("05", format(fmt_A("0"), tp, tz)); 
+  EXPECT_EQ("05.", format(fmt_B("0"), tp, tz)); 
+  // ... %E<prec>S and %S.%E<prec>f are the same for prec in [1:15]. 
+  for (int prec = 1; prec <= 15; ++prec) { 
+    const std::string a = format(fmt_A(std::to_string(prec)), tp, tz); 
+    const std::string b = format(fmt_B(std::to_string(prec)), tp, tz); 
+    EXPECT_EQ(a, b) << "prec=" << prec; 
+  } 
+ 
+  // With subseconds: 
+  // ... %E*S and %S.%E*f are the same. 
+  tp += chrono::milliseconds(6) + chrono::microseconds(7) + 
+        chrono::nanoseconds(8); 
+  EXPECT_EQ("05.006007008", format(fmt_A("*"), tp, tz)); 
+  EXPECT_EQ("05.006007008", format(fmt_B("*"), tp, tz)); 
+  // ... %E0S and %S.%E0f are different. 
+  EXPECT_EQ("05", format(fmt_A("0"), tp, tz)); 
+  EXPECT_EQ("05.", format(fmt_B("0"), tp, tz)); 
+  // ... %E<prec>S and %S.%E<prec>f are the same for prec in [1:15]. 
+  for (int prec = 1; prec <= 15; ++prec) { 
+    const std::string a = format(fmt_A(std::to_string(prec)), tp, tz); 
+    const std::string b = format(fmt_B(std::to_string(prec)), tp, tz); 
+    EXPECT_EQ(a, b) << "prec=" << prec; 
+  } 
+} 
+ 
+TEST(Format, ExtendedOffset) { 
+  const auto tp = chrono::system_clock::from_time_t(0); 
+ 
+  auto tz = fixed_time_zone(cctz::seconds::zero()); 
+  TestFormatSpecifier(tp, tz, "%z", "+0000"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+00:00"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+00:00"); 
+ 
+  tz = fixed_time_zone(chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%z", "+0000"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+00:00"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+00:00"); 
+ 
+  tz = fixed_time_zone(-chrono::seconds(56));  // NOTE: +00:00 
+  TestFormatSpecifier(tp, tz, "%z", "+0000"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+00:00"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+00:00"); 
+ 
+  tz = fixed_time_zone(chrono::minutes(34)); 
+  TestFormatSpecifier(tp, tz, "%z", "+0034"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+00:34"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+00:34"); 
+ 
+  tz = fixed_time_zone(-chrono::minutes(34)); 
+  TestFormatSpecifier(tp, tz, "%z", "-0034"); 
+  TestFormatSpecifier(tp, tz, "%:z", "-00:34"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "-00:34"); 
+ 
+  tz = fixed_time_zone(chrono::minutes(34) + chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%z", "+0034"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+00:34"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+00:34"); 
+ 
+  tz = fixed_time_zone(-chrono::minutes(34) - chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%z", "-0034"); 
+  TestFormatSpecifier(tp, tz, "%:z", "-00:34"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "-00:34"); 
+ 
+  tz = fixed_time_zone(chrono::hours(12)); 
+  TestFormatSpecifier(tp, tz, "%z", "+1200"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+12:00"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+12:00"); 
+ 
+  tz = fixed_time_zone(-chrono::hours(12)); 
+  TestFormatSpecifier(tp, tz, "%z", "-1200"); 
+  TestFormatSpecifier(tp, tz, "%:z", "-12:00"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "-12:00"); 
+ 
+  tz = fixed_time_zone(chrono::hours(12) + chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%z", "+1200"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+12:00"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+12:00"); 
+ 
+  tz = fixed_time_zone(-chrono::hours(12) - chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%z", "-1200"); 
+  TestFormatSpecifier(tp, tz, "%:z", "-12:00"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "-12:00"); 
+ 
+  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34)); 
+  TestFormatSpecifier(tp, tz, "%z", "+1234"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+12:34"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+12:34"); 
+ 
+  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34)); 
+  TestFormatSpecifier(tp, tz, "%z", "-1234"); 
+  TestFormatSpecifier(tp, tz, "%:z", "-12:34"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "-12:34"); 
+ 
+  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34) + 
+                       chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%z", "+1234"); 
+  TestFormatSpecifier(tp, tz, "%:z", "+12:34"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "+12:34"); 
+ 
+  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34) - 
+                       chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%z", "-1234"); 
+  TestFormatSpecifier(tp, tz, "%:z", "-12:34"); 
+  TestFormatSpecifier(tp, tz, "%Ez", "-12:34"); 
+} 
+ 
+TEST(Format, ExtendedSecondOffset) { 
+  const auto tp = chrono::system_clock::from_time_t(0); 
+ 
+  auto tz = fixed_time_zone(cctz::seconds::zero()); 
+  TestFormatSpecifier(tp, tz, "%E*z", "+00:00:00"); 
+  TestFormatSpecifier(tp, tz, "%::z", "+00:00:00"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "+00"); 
+ 
+  tz = fixed_time_zone(chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "+00:00:56"); 
+  TestFormatSpecifier(tp, tz, "%::z", "+00:00:56"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "+00:00:56"); 
+ 
+  tz = fixed_time_zone(-chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "-00:00:56"); 
+  TestFormatSpecifier(tp, tz, "%::z", "-00:00:56"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "-00:00:56"); 
+ 
+  tz = fixed_time_zone(chrono::minutes(34)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "+00:34:00"); 
+  TestFormatSpecifier(tp, tz, "%::z", "+00:34:00"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "+00:34"); 
+ 
+  tz = fixed_time_zone(-chrono::minutes(34)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "-00:34:00"); 
+  TestFormatSpecifier(tp, tz, "%::z", "-00:34:00"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "-00:34"); 
+ 
+  tz = fixed_time_zone(chrono::minutes(34) + chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "+00:34:56"); 
+  TestFormatSpecifier(tp, tz, "%::z", "+00:34:56"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "+00:34:56"); 
+ 
+  tz = fixed_time_zone(-chrono::minutes(34) - chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "-00:34:56"); 
+  TestFormatSpecifier(tp, tz, "%::z", "-00:34:56"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "-00:34:56"); 
+ 
+  tz = fixed_time_zone(chrono::hours(12)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "+12:00:00"); 
+  TestFormatSpecifier(tp, tz, "%::z", "+12:00:00"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "+12"); 
+ 
+  tz = fixed_time_zone(-chrono::hours(12)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "-12:00:00"); 
+  TestFormatSpecifier(tp, tz, "%::z", "-12:00:00"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "-12"); 
+ 
+  tz = fixed_time_zone(chrono::hours(12) + chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "+12:00:56"); 
+  TestFormatSpecifier(tp, tz, "%::z", "+12:00:56"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "+12:00:56"); 
+ 
+  tz = fixed_time_zone(-chrono::hours(12) - chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "-12:00:56"); 
+  TestFormatSpecifier(tp, tz, "%::z", "-12:00:56"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "-12:00:56"); 
+ 
+  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "+12:34:00"); 
+  TestFormatSpecifier(tp, tz, "%::z", "+12:34:00"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "+12:34"); 
+ 
+  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "-12:34:00"); 
+  TestFormatSpecifier(tp, tz, "%::z", "-12:34:00"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "-12:34"); 
+ 
+  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34) + 
+                       chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "+12:34:56"); 
+  TestFormatSpecifier(tp, tz, "%::z", "+12:34:56"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "+12:34:56"); 
+ 
+  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34) - 
+                       chrono::seconds(56)); 
+  TestFormatSpecifier(tp, tz, "%E*z", "-12:34:56"); 
+  TestFormatSpecifier(tp, tz, "%::z", "-12:34:56"); 
+  TestFormatSpecifier(tp, tz, "%:::z", "-12:34:56"); 
+} 
+ 
+TEST(Format, ExtendedYears) { 
+  const time_zone utc = utc_time_zone(); 
+  const char e4y_fmt[] = "%E4Y%m%d";  // no separators 
+ 
+  // %E4Y zero-pads the year to produce at least 4 chars, including the sign. 
+  auto tp = convert(civil_second(-999, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("-9991127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(-99, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("-0991127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(-9, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("-0091127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(-1, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("-0011127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(0, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("00001127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(1, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("00011127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(9, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("00091127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(99, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("00991127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(999, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("09991127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(9999, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("99991127", format(e4y_fmt, tp, utc)); 
+ 
+  // When the year is outside [-999:9999], more than 4 chars are produced. 
+  tp = convert(civil_second(-1000, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("-10001127", format(e4y_fmt, tp, utc)); 
+  tp = convert(civil_second(10000, 11, 27, 0, 0, 0), utc); 
+  EXPECT_EQ("100001127", format(e4y_fmt, tp, utc)); 
+} 
+ 
+TEST(Format, RFC3339Format) { 
+  time_zone tz; 
+  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz)); 
+ 
+  time_point<chrono::nanoseconds> tp = 
+      convert(civil_second(1977, 6, 28, 9, 8, 7), tz); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::milliseconds(100); 
+  EXPECT_EQ("1977-06-28T09:08:07.1-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::milliseconds(20); 
+  EXPECT_EQ("1977-06-28T09:08:07.12-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::milliseconds(3); 
+  EXPECT_EQ("1977-06-28T09:08:07.123-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::microseconds(400); 
+  EXPECT_EQ("1977-06-28T09:08:07.1234-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::microseconds(50); 
+  EXPECT_EQ("1977-06-28T09:08:07.12345-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::microseconds(6); 
+  EXPECT_EQ("1977-06-28T09:08:07.123456-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::nanoseconds(700); 
+  EXPECT_EQ("1977-06-28T09:08:07.1234567-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::nanoseconds(80); 
+  EXPECT_EQ("1977-06-28T09:08:07.12345678-07:00", format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+ 
+  tp += chrono::nanoseconds(9); 
+  EXPECT_EQ("1977-06-28T09:08:07.123456789-07:00", 
+            format(RFC3339_full, tp, tz)); 
+  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); 
+} 
+ 
+TEST(Format, RFC1123Format) {  // locale specific 
+  time_zone tz; 
+  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz)); 
+ 
+  auto tp = convert(civil_second(1977, 6, 28, 9, 8, 7), tz); 
+  EXPECT_EQ("Tue, 28 Jun 1977 09:08:07 -0700", format(RFC1123_full, tp, tz)); 
+  EXPECT_EQ("28 Jun 1977 09:08:07 -0700", format(RFC1123_no_wday, tp, tz)); 
+} 
+ 
+TEST(Format, Week) { 
+  const time_zone utc = utc_time_zone(); 
+ 
+  auto tp = convert(civil_second(2017, 1, 1, 0, 0, 0), utc); 
+  EXPECT_EQ("2017-01-7", format("%Y-%U-%u", tp, utc)); 
+  EXPECT_EQ("2017-00-0", format("%Y-%W-%w", tp, utc)); 
+ 
+  tp = convert(civil_second(2017, 12, 31, 0, 0, 0), utc); 
+  EXPECT_EQ("2017-53-7", format("%Y-%U-%u", tp, utc)); 
+  EXPECT_EQ("2017-52-0", format("%Y-%W-%w", tp, utc)); 
+ 
+  tp = convert(civil_second(2018, 1, 1, 0, 0, 0), utc); 
+  EXPECT_EQ("2018-00-1", format("%Y-%U-%u", tp, utc)); 
+  EXPECT_EQ("2018-01-1", format("%Y-%W-%w", tp, utc)); 
+ 
+  tp = convert(civil_second(2018, 12, 31, 0, 0, 0), utc); 
+  EXPECT_EQ("2018-52-1", format("%Y-%U-%u", tp, utc)); 
+  EXPECT_EQ("2018-53-1", format("%Y-%W-%w", tp, utc)); 
+ 
+  tp = convert(civil_second(2019, 1, 1, 0, 0, 0), utc); 
+  EXPECT_EQ("2019-00-2", format("%Y-%U-%u", tp, utc)); 
+  EXPECT_EQ("2019-00-2", format("%Y-%W-%w", tp, utc)); 
+ 
+  tp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc); 
+  EXPECT_EQ("2019-52-2", format("%Y-%U-%u", tp, utc)); 
+  EXPECT_EQ("2019-52-2", format("%Y-%W-%w", tp, utc)); 
+} 
+ 
+// 
+// Testing parse() 
+// 
+ 
+TEST(Parse, TimePointResolution) { 
+  const char kFmt[] = "%H:%M:%E*S"; 
+  const time_zone utc = utc_time_zone(); 
+ 
+  time_point<chrono::nanoseconds> tp_ns; 
+  EXPECT_TRUE(parse(kFmt, "03:04:05.123456789", utc, &tp_ns)); 
+  EXPECT_EQ("03:04:05.123456789", format(kFmt, tp_ns, utc)); 
+  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_ns)); 
+  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_ns, utc)); 
+ 
+  time_point<chrono::microseconds> tp_us; 
+  EXPECT_TRUE(parse(kFmt, "03:04:05.123456789", utc, &tp_us)); 
+  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_us, utc)); 
+  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_us)); 
+  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_us, utc)); 
+  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_us)); 
+  EXPECT_EQ("03:04:05.123", format(kFmt, tp_us, utc)); 
+ 
+  time_point<chrono::milliseconds> tp_ms; 
+  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_ms)); 
+  EXPECT_EQ("03:04:05.123", format(kFmt, tp_ms, utc)); 
+  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_ms)); 
+  EXPECT_EQ("03:04:05.123", format(kFmt, tp_ms, utc)); 
+  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_ms)); 
+  EXPECT_EQ("03:04:05", format(kFmt, tp_ms, utc)); 
+ 
+  time_point<chrono::seconds> tp_s; 
+  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_s)); 
+  EXPECT_EQ("03:04:05", format(kFmt, tp_s, utc)); 
+  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_s)); 
+  EXPECT_EQ("03:04:05", format(kFmt, tp_s, utc)); 
+ 
+  time_point<chrono::minutes> tp_m; 
+  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_m)); 
+  EXPECT_EQ("03:04:00", format(kFmt, tp_m, utc)); 
+ 
+  time_point<chrono::hours> tp_h; 
+  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_h)); 
+  EXPECT_EQ("03:00:00", format(kFmt, tp_h, utc)); 
+} 
+ 
+TEST(Parse, TimePointExtendedResolution) { 
+  const char kFmt[] = "%H:%M:%E*S"; 
+  const time_zone utc = utc_time_zone(); 
+ 
+  time_point<cctz::seconds> tp; 
+  detail::femtoseconds fs; 
+  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.123456789012345", utc, &tp, &fs)); 
+  EXPECT_EQ("12:34:56.123456789012345", detail::format(kFmt, tp, fs, utc)); 
+  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.012345678901234", utc, &tp, &fs)); 
+  EXPECT_EQ("12:34:56.012345678901234", detail::format(kFmt, tp, fs, utc)); 
+  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.001234567890123", utc, &tp, &fs)); 
+  EXPECT_EQ("12:34:56.001234567890123", detail::format(kFmt, tp, fs, utc)); 
+  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000123", utc, &tp, &fs)); 
+  EXPECT_EQ("12:34:56.000000000000123", detail::format(kFmt, tp, fs, utc)); 
+  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000012", utc, &tp, &fs)); 
+  EXPECT_EQ("12:34:56.000000000000012", detail::format(kFmt, tp, fs, utc)); 
+  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000001", utc, &tp, &fs)); 
+  EXPECT_EQ("12:34:56.000000000000001", detail::format(kFmt, tp, fs, utc)); 
+} 
+ 
+TEST(Parse, Basics) { 
+  time_zone tz = utc_time_zone(); 
+  time_point<chrono::nanoseconds> tp = 
+      chrono::system_clock::from_time_t(1234567890); 
+ 
+  // Simple edge cases. 
+  EXPECT_TRUE(parse("", "", tz, &tp)); 
+  EXPECT_EQ(chrono::system_clock::from_time_t(0), tp);  // everything defaulted 
+  EXPECT_TRUE(parse(" ", " ", tz, &tp)); 
+  EXPECT_TRUE(parse("  ", "  ", tz, &tp)); 
+  EXPECT_TRUE(parse("x", "x", tz, &tp)); 
+  EXPECT_TRUE(parse("xxx", "xxx", tz, &tp)); 
+ 
+  EXPECT_TRUE( 
+      parse("%Y-%m-%d %H:%M:%S %z", "2013-06-28 19:08:09 -0800", tz, &tp)); 
+  ExpectTime(tp, tz, 2013, 6, 29, 3, 8, 9, 0, false, "UTC"); 
+} 
+ 
+TEST(Parse, WithTimeZone) { 
+  time_zone tz; 
+  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz)); 
+  time_point<chrono::nanoseconds> tp; 
+ 
+  // We can parse a string without a UTC offset if we supply a timezone. 
+  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2013-06-28 19:08:09", tz, &tp)); 
+  ExpectTime(tp, tz, 2013, 6, 28, 19, 8, 9, -7 * 60 * 60, true, "PDT"); 
+ 
+  // But the timezone is ignored when a UTC offset is present. 
+  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S %z", "2013-06-28 19:08:09 +0800", 
+                    utc_time_zone(), &tp)); 
+  ExpectTime(tp, tz, 2013, 6, 28, 19 - 8 - 7, 8, 9, -7 * 60 * 60, true, "PDT"); 
+ 
+  // Check a skipped time (a Spring DST transition). parse() uses the 
+  // pre-transition offset. 
+  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2011-03-13 02:15:00", tz, &tp)); 
+  ExpectTime(tp, tz, 2011, 3, 13, 3, 15, 0, -7 * 60 * 60, true, "PDT"); 
+ 
+  // Check a repeated time (a Fall DST transition).  parse() uses the 
+  // pre-transition offset. 
+  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2011-11-06 01:15:00", tz, &tp)); 
+  ExpectTime(tp, tz, 2011, 11, 6, 1, 15, 0, -7 * 60 * 60, true, "PDT"); 
+} 
+ 
+TEST(Parse, LeapSecond) { 
+  time_zone tz; 
+  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz)); 
+  time_point<chrono::nanoseconds> tp; 
+ 
+  // ":59" -> ":59" 
+  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:59-08:00", tz, &tp)); 
+  ExpectTime(tp, tz, 2013, 6, 28, 8, 8, 59, -7 * 60 * 60, true, "PDT"); 
+ 
+  // ":59.5" -> ":59.5" 
+  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:59.5-08:00", tz, &tp)); 
+  ExpectTime(tp, tz, 2013, 6, 28, 8, 8, 59, -7 * 60 * 60, true, "PDT"); 
+ 
+  // ":60" -> ":00" 
+  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:60-08:00", tz, &tp)); 
+  ExpectTime(tp, tz, 2013, 6, 28, 8, 9, 0, -7 * 60 * 60, true, "PDT"); 
+ 
+  // ":60.5" -> ":00.0" 
+  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:60.5-08:00", tz, &tp)); 
+  ExpectTime(tp, tz, 2013, 6, 28, 8, 9, 0, -7 * 60 * 60, true, "PDT"); 
+ 
+  // ":61" -> error 
+  EXPECT_FALSE(parse(RFC3339_full, "2013-06-28T07:08:61-08:00", tz, &tp)); 
+} 
+ 
+TEST(Parse, ErrorCases) { 
+  const time_zone tz = utc_time_zone(); 
+  auto tp = chrono::system_clock::from_time_t(0); 
+ 
+  // Illegal trailing data. 
+  EXPECT_FALSE(parse("%S", "123", tz, &tp)); 
+ 
+  // Can't parse an illegal format specifier. 
+  EXPECT_FALSE(parse("%Q", "x", tz, &tp)); 
+ 
+  // Fails because of trailing, unparsed data "blah". 
+  EXPECT_FALSE(parse("%m-%d", "2-3 blah", tz, &tp)); 
+ 
+  // Trailing whitespace is allowed. 
+  EXPECT_TRUE(parse("%m-%d", "2-3  ", tz, &tp)); 
+  EXPECT_EQ(2, convert(tp, utc_time_zone()).month()); 
+  EXPECT_EQ(3, convert(tp, utc_time_zone()).day()); 
+ 
+  // Feb 31 requires normalization. 
+  EXPECT_FALSE(parse("%m-%d", "2-31", tz, &tp)); 
+ 
+  // Check that we cannot have spaces in UTC offsets. 
+  EXPECT_TRUE(parse("%z", "-0203", tz, &tp)); 
+  EXPECT_FALSE(parse("%z", "- 2 3", tz, &tp)); 
+  EXPECT_TRUE(parse("%Ez", "-02:03", tz, &tp)); 
+  EXPECT_FALSE(parse("%Ez", "- 2: 3", tz, &tp)); 
+ 
+  // Check that we reject other malformed UTC offsets. 
+  EXPECT_FALSE(parse("%Ez", "+-08:00", tz, &tp)); 
+  EXPECT_FALSE(parse("%Ez", "-+08:00", tz, &tp)); 
+ 
+  // Check that we do not accept "-0" in fields that allow zero. 
+  EXPECT_FALSE(parse("%Y", "-0", tz, &tp)); 
+  EXPECT_FALSE(parse("%E4Y", "-0", tz, &tp)); 
+  EXPECT_FALSE(parse("%H", "-0", tz, &tp)); 
+  EXPECT_FALSE(parse("%M", "-0", tz, &tp)); 
+  EXPECT_FALSE(parse("%S", "-0", tz, &tp)); 
+  EXPECT_FALSE(parse("%z", "+-000", tz, &tp)); 
+  EXPECT_FALSE(parse("%Ez", "+-0:00", tz, &tp)); 
+  EXPECT_FALSE(parse("%z", "-00-0", tz, &tp)); 
+  EXPECT_FALSE(parse("%Ez", "-00:-0", tz, &tp)); 
+} 
+ 
+TEST(Parse, PosixConversions) { 
+  time_zone tz = utc_time_zone(); 
+  auto tp = chrono::system_clock::from_time_t(0); 
+  const auto reset = convert(civil_second(1977, 6, 28, 9, 8, 7), tz); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%d", "15", tz, &tp)); 
+  EXPECT_EQ(15, convert(tp, tz).day()); 
+ 
+  // %e is an extension, but is supported internally. 
+  tp = reset; 
+  EXPECT_TRUE(parse("%e", "15", tz, &tp)); 
+  EXPECT_EQ(15, convert(tp, tz).day());  // Equivalent to %d 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%H", "17", tz, &tp)); 
+  EXPECT_EQ(17, convert(tp, tz).hour()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%I", "5", tz, &tp)); 
+  EXPECT_EQ(5, convert(tp, tz).hour()); 
+ 
+  // %j is parsed but ignored. 
+  EXPECT_TRUE(parse("%j", "32", tz, &tp)); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%m", "11", tz, &tp)); 
+  EXPECT_EQ(11, convert(tp, tz).month()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%M", "33", tz, &tp)); 
+  EXPECT_EQ(33, convert(tp, tz).minute()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%S", "55", tz, &tp)); 
+  EXPECT_EQ(55, convert(tp, tz).second()); 
+ 
+  // %U is parsed but ignored. 
+  EXPECT_TRUE(parse("%U", "15", tz, &tp)); 
+ 
+  // %w is parsed but ignored. 
+  EXPECT_TRUE(parse("%w", "2", tz, &tp)); 
+ 
+  // %W is parsed but ignored. 
+  EXPECT_TRUE(parse("%W", "22", tz, &tp)); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%y", "04", tz, &tp)); 
+  EXPECT_EQ(2004, convert(tp, tz).year()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%Y", "2004", tz, &tp)); 
+  EXPECT_EQ(2004, convert(tp, tz).year()); 
+ 
+  EXPECT_TRUE(parse("%%", "%", tz, &tp)); 
+ 
+#if defined(__linux__) 
+  // SU/C99/TZ extensions 
+ 
+  // Because we handle each (non-internal) specifier in a separate call 
+  // to strptime(), there is no way to group %C and %y together.  So we 
+  // just skip the %C/%y case. 
+#if 0 
+  tp = reset; 
+  EXPECT_TRUE(parse("%C %y", "20 04", tz, &tp)); 
+  EXPECT_EQ(2004, convert(tp, tz).year()); 
+#endif 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%D", "02/03/04", tz, &tp)); 
+  EXPECT_EQ(2, convert(tp, tz).month()); 
+  EXPECT_EQ(3, convert(tp, tz).day()); 
+  EXPECT_EQ(2004, convert(tp, tz).year()); 
+ 
+  EXPECT_TRUE(parse("%n", "\n", tz, &tp)); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%R", "03:44", tz, &tp)); 
+  EXPECT_EQ(3, convert(tp, tz).hour()); 
+  EXPECT_EQ(44, convert(tp, tz).minute()); 
+ 
+  EXPECT_TRUE(parse("%t", "\t\v\f\n\r ", tz, &tp)); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%T", "03:44:55", tz, &tp)); 
+  EXPECT_EQ(3, convert(tp, tz).hour()); 
+  EXPECT_EQ(44, convert(tp, tz).minute()); 
+  EXPECT_EQ(55, convert(tp, tz).second()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%s", "1234567890", tz, &tp)); 
+  EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp); 
+ 
+  // %s conversion, like %z/%Ez, pays no heed to the optional zone. 
+  time_zone lax; 
+  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &lax)); 
+  tp = reset; 
+  EXPECT_TRUE(parse("%s", "1234567890", lax, &tp)); 
+  EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp); 
+ 
+  // This is most important when the time has the same YMDhms 
+  // breakdown in the zone as some other time.  For example, ... 
+  //  1414917000 in US/Pacific -> Sun Nov 2 01:30:00 2014 (PDT) 
+  //  1414920600 in US/Pacific -> Sun Nov 2 01:30:00 2014 (PST) 
+  tp = reset; 
+  EXPECT_TRUE(parse("%s", "1414917000", lax, &tp)); 
+  EXPECT_EQ(chrono::system_clock::from_time_t(1414917000), tp); 
+  tp = reset; 
+  EXPECT_TRUE(parse("%s", "1414920600", lax, &tp)); 
+  EXPECT_EQ(chrono::system_clock::from_time_t(1414920600), tp); 
+#endif 
+} 
+ 
+TEST(Parse, LocaleSpecific) { 
+  time_zone tz = utc_time_zone(); 
+  auto tp = chrono::system_clock::from_time_t(0); 
+  const auto reset = convert(civil_second(1977, 6, 28, 9, 8, 7), tz); 
+ 
+  // %a is parsed but ignored. 
+  EXPECT_TRUE(parse("%a", "Mon", tz, &tp)); 
+ 
+  // %A is parsed but ignored. 
+  EXPECT_TRUE(parse("%A", "Monday", tz, &tp)); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%b", "Feb", tz, &tp)); 
+  EXPECT_EQ(2, convert(tp, tz).month()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%B", "February", tz, &tp)); 
+  EXPECT_EQ(2, convert(tp, tz).month()); 
+ 
+  // %p is parsed but ignored if it's alone.  But it's used with %I. 
+  EXPECT_TRUE(parse("%p", "AM", tz, &tp)); 
+  tp = reset; 
+  EXPECT_TRUE(parse("%I %p", "5 PM", tz, &tp)); 
+  EXPECT_EQ(17, convert(tp, tz).hour()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%x", "02/03/04", tz, &tp)); 
+  if (convert(tp, tz).month() == 2) { 
+    EXPECT_EQ(3, convert(tp, tz).day()); 
+  } else { 
+    EXPECT_EQ(2, convert(tp, tz).day()); 
+    EXPECT_EQ(3, convert(tp, tz).month()); 
+  } 
+  EXPECT_EQ(2004, convert(tp, tz).year()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%X", "15:44:55", tz, &tp)); 
+  EXPECT_EQ(15, convert(tp, tz).hour()); 
+  EXPECT_EQ(44, convert(tp, tz).minute()); 
+  EXPECT_EQ(55, convert(tp, tz).second()); 
+ 
+#if defined(__linux__) 
+  // SU/C99/TZ extensions 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%h", "Feb", tz, &tp)); 
+  EXPECT_EQ(2, convert(tp, tz).month());  // Equivalent to %b 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%l %p", "5 PM", tz, &tp)); 
+  EXPECT_EQ(17, convert(tp, tz).hour()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%r", "03:44:55 PM", tz, &tp)); 
+  EXPECT_EQ(15, convert(tp, tz).hour()); 
+  EXPECT_EQ(44, convert(tp, tz).minute()); 
+  EXPECT_EQ(55, convert(tp, tz).second()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%Ec", "Tue Nov 19 05:06:07 2013", tz, &tp)); 
+  EXPECT_EQ(convert(civil_second(2013, 11, 19, 5, 6, 7), tz), tp); 
+ 
+  // Modified conversion specifiers %E_ 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%Ex", "02/03/04", tz, &tp)); 
+  EXPECT_EQ(2, convert(tp, tz).month()); 
+  EXPECT_EQ(3, convert(tp, tz).day()); 
+  EXPECT_EQ(2004, convert(tp, tz).year()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%EX", "15:44:55", tz, &tp)); 
+  EXPECT_EQ(15, convert(tp, tz).hour()); 
+  EXPECT_EQ(44, convert(tp, tz).minute()); 
+  EXPECT_EQ(55, convert(tp, tz).second()); 
+ 
+  // %Ey, the year offset from %EC, doesn't really make sense alone as there 
+  // is no way to represent it in tm_year (%EC is not simply the century). 
+  // Yet, because we handle each (non-internal) specifier in a separate call 
+  // to strptime(), there is no way to group %EC and %Ey either.  So we just 
+  // skip the %EC and %Ey cases. 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%EY", "2004", tz, &tp)); 
+  EXPECT_EQ(2004, convert(tp, tz).year()); 
+ 
+  // Modified conversion specifiers %O_ 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%Od", "15", tz, &tp)); 
+  EXPECT_EQ(15, convert(tp, tz).day()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%Oe", "15", tz, &tp)); 
+  EXPECT_EQ(15, convert(tp, tz).day());  // Equivalent to %d 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%OH", "17", tz, &tp)); 
+  EXPECT_EQ(17, convert(tp, tz).hour()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%OI", "5", tz, &tp)); 
+  EXPECT_EQ(5, convert(tp, tz).hour()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%Om", "11", tz, &tp)); 
+  EXPECT_EQ(11, convert(tp, tz).month()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%OM", "33", tz, &tp)); 
+  EXPECT_EQ(33, convert(tp, tz).minute()); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%OS", "55", tz, &tp)); 
+  EXPECT_EQ(55, convert(tp, tz).second()); 
+ 
+  // %OU is parsed but ignored. 
+  EXPECT_TRUE(parse("%OU", "15", tz, &tp)); 
+ 
+  // %Ow is parsed but ignored. 
+  EXPECT_TRUE(parse("%Ow", "2", tz, &tp)); 
+ 
+  // %OW is parsed but ignored. 
+  EXPECT_TRUE(parse("%OW", "22", tz, &tp)); 
+ 
+  tp = reset; 
+  EXPECT_TRUE(parse("%Oy", "04", tz, &tp)); 
+  EXPECT_EQ(2004, convert(tp, tz).year()); 
+#endif 
+} 
+ 
+TEST(Parse, ExtendedSeconds) { 
+  const time_zone tz = utc_time_zone(); 
+  const time_point<chrono::nanoseconds> unix_epoch = 
+      chrono::system_clock::from_time_t(0); 
+ 
+  // All %E<prec>S cases are treated the same as %E*S on input. 
+  auto precisions = {"*", "0", "1",  "2",  "3",  "4",  "5",  "6", "7", 
+                     "8", "9", "10", "11", "12", "13", "14", "15"}; 
+  for (const std::string& prec : precisions) { 
+    const std::string fmt = "%E" + prec + "S"; 
+    SCOPED_TRACE(fmt); 
+    time_point<chrono::nanoseconds> tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "5", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05.0", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05.00", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05.6", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05.60", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05.600", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05.67", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(670), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05.670", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(670), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "05.678", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(678), tp); 
+  } 
+ 
+  // Here is a "%E*S" case we got wrong for a while.  The fractional 
+  // part of the first instant is less than 2^31 and was correctly 
+  // parsed, while the second (and any subsecond field >=2^31) failed. 
+  time_point<chrono::nanoseconds> tp = unix_epoch; 
+  EXPECT_TRUE(parse("%E*S", "0.2147483647", tz, &tp)); 
+  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); 
+  tp = unix_epoch; 
+  EXPECT_TRUE(parse("%E*S", "0.2147483648", tz, &tp)); 
+  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); 
+ 
+  // We should also be able to specify long strings of digits far 
+  // beyond the current resolution and have them convert the same way. 
+  tp = unix_epoch; 
+  EXPECT_TRUE(parse( 
+      "%E*S", "0.214748364801234567890123456789012345678901234567890123456789", 
+      tz, &tp)); 
+  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); 
+} 
+ 
+TEST(Parse, ExtendedSecondsScan) { 
+  const time_zone tz = utc_time_zone(); 
+  time_point<chrono::nanoseconds> tp; 
+  for (int ms = 0; ms < 1000; ms += 111) { 
+    for (int us = 0; us < 1000; us += 27) { 
+      const int micros = ms * 1000 + us; 
+      for (int ns = 0; ns < 1000; ns += 9) { 
+        const auto expected = chrono::system_clock::from_time_t(0) + 
+                              chrono::nanoseconds(micros * 1000 + ns); 
+        std::ostringstream oss; 
+        oss << "0." << std::setfill('0') << std::setw(3); 
+        oss << ms << std::setw(3) << us << std::setw(3) << ns; 
+        const std::string input = oss.str(); 
+        EXPECT_TRUE(parse("%E*S", input, tz, &tp)); 
+        EXPECT_EQ(expected, tp) << input; 
+      } 
+    } 
+  } 
+} 
+ 
+TEST(Parse, ExtendedSubeconds) { 
+  const time_zone tz = utc_time_zone(); 
+  const time_point<chrono::nanoseconds> unix_epoch = 
+      chrono::system_clock::from_time_t(0); 
+ 
+  // All %E<prec>f cases are treated the same as %E*f on input. 
+  auto precisions = {"*", "0", "1",  "2",  "3",  "4",  "5",  "6", "7", 
+                     "8", "9", "10", "11", "12", "13", "14", "15"}; 
+  for (const std::string& prec : precisions) { 
+    const std::string fmt = "%E" + prec + "f"; 
+    SCOPED_TRACE(fmt); 
+    time_point<chrono::nanoseconds> tp = unix_epoch - chrono::seconds(1); 
+    EXPECT_TRUE(parse(fmt, "", tz, &tp)); 
+    EXPECT_EQ(unix_epoch, tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "6", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "60", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "600", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "67", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::milliseconds(670), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "670", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::milliseconds(670), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "678", tz, &tp)); 
+    EXPECT_EQ(unix_epoch + chrono::milliseconds(678), tp); 
+    tp = unix_epoch; 
+    EXPECT_TRUE(parse(fmt, "6789", tz, &tp)); 
+    EXPECT_EQ( 
+        unix_epoch + chrono::milliseconds(678) + chrono::microseconds(900), tp); 
+  } 
+ 
+  // Here is a "%E*f" case we got wrong for a while.  The fractional 
+  // part of the first instant is less than 2^31 and was correctly 
+  // parsed, while the second (and any subsecond field >=2^31) failed. 
+  time_point<chrono::nanoseconds> tp = unix_epoch; 
+  EXPECT_TRUE(parse("%E*f", "2147483647", tz, &tp)); 
+  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); 
+  tp = unix_epoch; 
+  EXPECT_TRUE(parse("%E*f", "2147483648", tz, &tp)); 
+  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); 
+ 
+  // We should also be able to specify long strings of digits far 
+  // beyond the current resolution and have them convert the same way. 
+  tp = unix_epoch; 
+  EXPECT_TRUE(parse( 
+      "%E*f", "214748364801234567890123456789012345678901234567890123456789", 
+      tz, &tp)); 
+  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); 
+} 
+ 
+TEST(Parse, ExtendedSubecondsScan) { 
+  time_point<chrono::nanoseconds> tp; 
+  const time_zone tz = utc_time_zone(); 
+  for (int ms = 0; ms < 1000; ms += 111) { 
+    for (int us = 0; us < 1000; us += 27) { 
+      const int micros = ms * 1000 + us; 
+      for (int ns = 0; ns < 1000; ns += 9) { 
+        std::ostringstream oss; 
+        oss << std::setfill('0') << std::setw(3) << ms; 
+        oss << std::setw(3) << us << std::setw(3) << ns; 
+        const std::string nanos = oss.str(); 
+        const auto expected = chrono::system_clock::from_time_t(0) + 
+                              chrono::nanoseconds(micros * 1000 + ns); 
+        for (int ps = 0; ps < 1000; ps += 250) { 
+          std::ostringstream ps_oss; 
+          oss << std::setfill('0') << std::setw(3) << ps; 
+          const std::string input = nanos + ps_oss.str() + "999"; 
+          EXPECT_TRUE(parse("%E*f", input, tz, &tp)); 
+          EXPECT_EQ(expected + chrono::nanoseconds(ps) / 1000, tp) << input; 
+        } 
+      } 
+    } 
+  } 
+} 
+ 
+TEST(Parse, ExtendedOffset) { 
+  const time_zone utc = utc_time_zone(); 
+  time_point<cctz::seconds> tp; 
+ 
+  EXPECT_TRUE(parse("%Ez", "+00:00", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse("%Ez", "-12:34", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp); 
+  EXPECT_TRUE(parse("%Ez", "+12:34", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp); 
+  EXPECT_FALSE(parse("%Ez", "-12:3", utc, &tp)); 
+ 
+  for (auto fmt : {"%Ez", "%z"}) { 
+    EXPECT_TRUE(parse(fmt, "+0000", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "-1234", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "+1234", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp); 
+    EXPECT_FALSE(parse(fmt, "-123", utc, &tp)); 
+ 
+    EXPECT_TRUE(parse(fmt, "+00", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "-12", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "+12", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1969, 12, 31, 12, 0, 0), utc), tp); 
+    EXPECT_FALSE(parse(fmt, "-1", utc, &tp)); 
+  } 
+} 
+ 
+TEST(Parse, ExtendedSecondOffset) { 
+  const time_zone utc = utc_time_zone(); 
+  time_point<cctz::seconds> tp; 
+ 
+  for (auto fmt : {"%Ez", "%E*z", "%:z", "%::z", "%:::z"}) { 
+    EXPECT_TRUE(parse(fmt, "+00:00:00", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "-12:34:56", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 56), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "+12:34:56", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 25, 4), utc), tp); 
+    EXPECT_FALSE(parse(fmt, "-12:34:5", utc, &tp)); 
+ 
+    EXPECT_TRUE(parse(fmt, "+000000", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "-123456", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 56), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "+123456", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 25, 4), utc), tp); 
+    EXPECT_FALSE(parse(fmt, "-12345", utc, &tp)); 
+ 
+    EXPECT_TRUE(parse(fmt, "+00:00", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "-12:34", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "+12:34", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp); 
+    EXPECT_FALSE(parse(fmt, "-12:3", utc, &tp)); 
+ 
+    EXPECT_TRUE(parse(fmt, "+0000", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "-1234", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "+1234", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp); 
+    EXPECT_FALSE(parse(fmt, "-123", utc, &tp)); 
+ 
+    EXPECT_TRUE(parse(fmt, "+00", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "-12", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 0, 0), utc), tp); 
+    EXPECT_TRUE(parse(fmt, "+12", utc, &tp)); 
+    EXPECT_EQ(convert(civil_second(1969, 12, 31, 12, 0, 0), utc), tp); 
+    EXPECT_FALSE(parse(fmt, "-1", utc, &tp)); 
+  } 
+} 
+ 
+TEST(Parse, ExtendedYears) { 
+  const time_zone utc = utc_time_zone(); 
+  const char e4y_fmt[] = "%E4Y%m%d";  // no separators 
+  time_point<cctz::seconds> tp; 
+ 
+  // %E4Y consumes exactly four chars, including any sign. 
+  EXPECT_TRUE(parse(e4y_fmt, "-9991127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(-999, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "-0991127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(-99, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "-0091127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(-9, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "-0011127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(-1, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "00001127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(0, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "00011127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(1, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "00091127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(9, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "00991127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(99, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "09991127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(999, 11, 27, 0, 0, 0), utc), tp); 
+  EXPECT_TRUE(parse(e4y_fmt, "99991127", utc, &tp)); 
+  EXPECT_EQ(convert(civil_second(9999, 11, 27, 0, 0, 0), utc), tp); 
+ 
+  // When the year is outside [-999:9999], the parse fails. 
+  EXPECT_FALSE(parse(e4y_fmt, "-10001127", utc, &tp)); 
+  EXPECT_FALSE(parse(e4y_fmt, "100001127", utc, &tp)); 
+} 
+ 
+TEST(Parse, RFC3339Format) { 
+  const time_zone tz = utc_time_zone(); 
+  time_point<chrono::nanoseconds> tp; 
+  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00+00:00", tz, &tp)); 
+  ExpectTime(tp, tz, 2014, 2, 12, 20, 21, 0, 0, false, "UTC"); 
+ 
+  // Check that %ET also accepts "t". 
+  time_point<chrono::nanoseconds> tp2; 
+  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12t20:21:00+00:00", tz, &tp2)); 
+  EXPECT_EQ(tp, tp2); 
+ 
+  // Check that %Ez also accepts "Z" as a synonym for "+00:00". 
+  time_point<chrono::nanoseconds> tp3; 
+  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00Z", tz, &tp3)); 
+  EXPECT_EQ(tp, tp3); 
+ 
+  // Check that %Ez also accepts "z" as a synonym for "+00:00". 
+  time_point<chrono::nanoseconds> tp4; 
+  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00z", tz, &tp4)); 
+  EXPECT_EQ(tp, tp4); 
+} 
+ 
+TEST(Parse, Week) { 
+  const time_zone utc = utc_time_zone(); 
+  time_point<cctz::seconds> tp; 
+ 
+  auto exp = convert(civil_second(2017, 1, 1, 0, 0, 0), utc); 
+  EXPECT_TRUE(parse("%Y-%U-%u", "2017-01-7", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+  EXPECT_TRUE(parse("%Y-%W-%w", "2017-00-0", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+ 
+  exp = convert(civil_second(2017, 12, 31, 0, 0, 0), utc); 
+  EXPECT_TRUE(parse("%Y-%U-%u", "2017-53-7", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+  EXPECT_TRUE(parse("%Y-%W-%w", "2017-52-0", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+ 
+  exp = convert(civil_second(2018, 1, 1, 0, 0, 0), utc); 
+  EXPECT_TRUE(parse("%Y-%U-%u", "2018-00-1", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+  EXPECT_TRUE(parse("%Y-%W-%w", "2018-01-1", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+ 
+  exp = convert(civil_second(2018, 12, 31, 0, 0, 0), utc); 
+  EXPECT_TRUE(parse("%Y-%U-%u", "2018-52-1", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+  EXPECT_TRUE(parse("%Y-%W-%w", "2018-53-1", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+ 
+  exp = convert(civil_second(2019, 1, 1, 0, 0, 0), utc); 
+  EXPECT_TRUE(parse("%Y-%U-%u", "2019-00-2", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+  EXPECT_TRUE(parse("%Y-%W-%w", "2019-00-2", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+ 
+  exp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc); 
+  EXPECT_TRUE(parse("%Y-%U-%u", "2019-52-2", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+  EXPECT_TRUE(parse("%Y-%W-%w", "2019-52-2", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+} 
+ 
+TEST(Parse, WeekYearShift) { 
+  // %U/%W conversions with week values in {0, 52, 53} can slip 
+  // into the previous/following calendar years. 
+  const time_zone utc = utc_time_zone(); 
+  time_point<cctz::seconds> tp; 
+ 
+  auto exp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc); 
+  EXPECT_TRUE(parse("%Y-%U-%u", "2020-00-2", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+  EXPECT_TRUE(parse("%Y-%W-%w", "2020-00-2", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+ 
+  exp = convert(civil_second(2021, 1, 1, 0, 0, 0), utc); 
+  EXPECT_TRUE(parse("%Y-%U-%u", "2020-52-5", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+  EXPECT_TRUE(parse("%Y-%W-%w", "2020-52-5", utc, &tp)); 
+  EXPECT_EQ(exp, tp); 
+ 
+  // Slipping into the previous/following calendar years should fail when 
+  // we're already at the extremes. 
+  EXPECT_FALSE(parse("%Y-%U-%u", "-9223372036854775808-0-7", utc, &tp)); 
+  EXPECT_FALSE(parse("%Y-%U-%u", "9223372036854775807-53-7", utc, &tp)); 
+} 
+ 
+TEST(Parse, MaxRange) { 
+  const time_zone utc = utc_time_zone(); 
+  time_point<cctz::seconds> tp; 
+ 
+  // tests the upper limit using +00:00 offset 
+  EXPECT_TRUE( 
+      parse(RFC3339_sec, "292277026596-12-04T15:30:07+00:00", utc, &tp)); 
+  EXPECT_EQ(tp, time_point<cctz::seconds>::max()); 
+  EXPECT_FALSE( 
+      parse(RFC3339_sec, "292277026596-12-04T15:30:08+00:00", utc, &tp)); 
+ 
+  // tests the upper limit using -01:00 offset 
+  EXPECT_TRUE( 
+      parse(RFC3339_sec, "292277026596-12-04T14:30:07-01:00", utc, &tp)); 
+  EXPECT_EQ(tp, time_point<cctz::seconds>::max()); 
+  EXPECT_FALSE( 
+      parse(RFC3339_sec, "292277026596-12-04T15:30:07-01:00", utc, &tp)); 
+ 
+  // tests the lower limit using +00:00 offset 
+  EXPECT_TRUE( 
+      parse(RFC3339_sec, "-292277022657-01-27T08:29:52+00:00", utc, &tp)); 
+  EXPECT_EQ(tp, time_point<cctz::seconds>::min()); 
+  EXPECT_FALSE( 
+      parse(RFC3339_sec, "-292277022657-01-27T08:29:51+00:00", utc, &tp)); 
+ 
+  // tests the lower limit using +01:00 offset 
+  EXPECT_TRUE( 
+      parse(RFC3339_sec, "-292277022657-01-27T09:29:52+01:00", utc, &tp)); 
+  EXPECT_EQ(tp, time_point<cctz::seconds>::min()); 
+  EXPECT_FALSE( 
+      parse(RFC3339_sec, "-292277022657-01-27T08:29:51+01:00", utc, &tp)); 
+ 
+  // tests max/min civil-second overflow 
+  EXPECT_FALSE(parse(RFC3339_sec, "9223372036854775807-12-31T23:59:59-00:01", 
+                     utc, &tp)); 
+  EXPECT_FALSE(parse(RFC3339_sec, "-9223372036854775808-01-01T00:00:00+00:01", 
+                     utc, &tp)); 
+ 
+  // TODO: Add tests that parsing times with fractional seconds overflow 
+  // appropriately. This can't be done until cctz::parse() properly detects 
+  // overflow when combining the chrono seconds and femto. 
+} 
+ 
+// 
+// Roundtrip test for format()/parse(). 
+// 
+ 
+TEST(FormatParse, RoundTrip) { 
+  time_zone lax; 
+  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &lax)); 
+  const auto in = convert(civil_second(1977, 6, 28, 9, 8, 7), lax); 
+  const auto subseconds = chrono::nanoseconds(654321); 
+ 
+  // RFC3339, which renders subseconds. 
+  { 
+    time_point<chrono::nanoseconds> out; 
+    const std::string s = format(RFC3339_full, in + subseconds, lax); 
+    EXPECT_TRUE(parse(RFC3339_full, s, lax, &out)) << s; 
+    EXPECT_EQ(in + subseconds, out);  // RFC3339_full includes %Ez 
+  } 
+ 
+  // RFC1123, which only does whole seconds. 
+  { 
+    time_point<chrono::nanoseconds> out; 
+    const std::string s = format(RFC1123_full, in, lax); 
+    EXPECT_TRUE(parse(RFC1123_full, s, lax, &out)) << s; 
+    EXPECT_EQ(in, out);  // RFC1123_full includes %z 
+  } 
+ 
+#if defined(_WIN32) || defined(_WIN64) 
+  // Initial investigations indicate the %c does not roundtrip on Windows. 
+  // TODO: Figure out what is going on here (perhaps a locale problem). 
+#else 
+  // Even though we don't know what %c will produce, it should roundtrip, 
+  // but only in the 0-offset timezone. 
+  { 
+    time_point<chrono::nanoseconds> out; 
+    time_zone utc = utc_time_zone(); 
+    const std::string s = format("%c", in, utc); 
+    EXPECT_TRUE(parse("%c", s, utc, &out)) << s; 
+    EXPECT_EQ(in, out); 
+  } 
+#endif 
+} 
+ 
+TEST(FormatParse, RoundTripDistantFuture) { 
+  const time_zone utc = utc_time_zone(); 
+  const time_point<cctz::seconds> in = time_point<cctz::seconds>::max(); 
+  const std::string s = format(RFC3339_full, in, utc); 
+  time_point<cctz::seconds> out; 
+  EXPECT_TRUE(parse(RFC3339_full, s, utc, &out)) << s; 
+  EXPECT_EQ(in, out); 
+} 
+ 
+TEST(FormatParse, RoundTripDistantPast) { 
+  const time_zone utc = utc_time_zone(); 
+  const time_point<cctz::seconds> in = time_point<cctz::seconds>::min(); 
+  const std::string s = format(RFC3339_full, in, utc); 
+  time_point<cctz::seconds> out; 
+  EXPECT_TRUE(parse(RFC3339_full, s, utc, &out)) << s; 
+  EXPECT_EQ(in, out); 
+} 
+ 
+}  // namespace cctz