Set the Gregorian changeover date to the beginning of time in Intl

src/i18n.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // limitations under the License.
 
 #include "src/i18n.h"
 
 #include "src/api.h"
 #include "src/factory.h"
 #include "src/isolate.h"
 #include "unicode/brkiter.h"
 #include "unicode/calendar.h"
 #include "unicode/coll.h"
 #include "unicode/curramt.h"
 #include "unicode/dcfmtsym.h"
 #include "unicode/decimfmt.h"
 #include "unicode/dtfmtsym.h"
 #include "unicode/dtptngen.h"
+#include "unicode/gregocal.h"
 #include "unicode/locid.h"
 #include "unicode/numfmt.h"
 #include "unicode/numsys.h"
 #include "unicode/rbbi.h"
 #include "unicode/smpdtfmt.h"
 #include "unicode/timezone.h"
 #include "unicode/uchar.h"
 #include "unicode/ucol.h"
 #include "unicode/ucurr.h"
 #include "unicode/unum.h"
@@ skipping 60 matching lines @@
     tz = icu::TimeZone::createTimeZone(timezone);
   } else {
     tz = icu::TimeZone::createDefault();
   }
 
   // Create a calendar using locale, and apply time zone to it.
   UErrorCode status = U_ZERO_ERROR;
   icu::Calendar* calendar =
       icu::Calendar::createInstance(tz, icu_locale, status);
 
+  if (calendar->getDynamicClassID() ==
+      icu::GregorianCalendar::getStaticClassID()) {
+    icu::GregorianCalendar* gc = (icu::GregorianCalendar*)calendar;
+    UErrorCode status = U_ZERO_ERROR;
+    // The beginning of ECMAScript time, namely -(2**53)
+    const double start_of_time = -9007199254740992;
+    gc->setGregorianChange(start_of_time, status);
+    DCHECK(U_SUCCESS(status));
+  }
+
   // Make formatter from skeleton. Calendar and numbering system are added
   // to the locale as Unicode extension (if they were specified at all).
   icu::SimpleDateFormat* date_format = NULL;
   icu::UnicodeString skeleton;
   if (ExtractStringSetting(isolate, options, "skeleton", &skeleton)) {
     icu::DateTimePatternGenerator* generator =
         icu::DateTimePatternGenerator::createInstance(icu_locale, status);
     icu::UnicodeString pattern;
     if (U_SUCCESS(status)) {
       pattern = generator->getBestPattern(skeleton, status);
@@ skipping 853 matching lines @@
 
 void BreakIterator::DeleteBreakIterator(
     const v8::WeakCallbackData<v8::Value, void>& data) {
   DeleteNativeObjectAt<icu::BreakIterator>(data, 0);
   DeleteNativeObjectAt<icu::UnicodeString>(data, 1);
   DestroyGlobalHandle(data);
 }
 
 }  // namespace internal
 }  // namespace v8