Make isUtc a getter, change some method names in Date.

tests/corelib/date_time_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Dart test program for Date.
 
 class DateTest {
   // Tests if the time moves eventually forward.
   static void testNow() {
     var t1 = new Date.now();
     bool timeMovedForward = false;
     for (int i = 0; i < 1000000; i++) {
       var t2 = new Date.now();
-      if (t1.value < t2.value) {
+      if (t1.millisecondsSinceEpoch < t2.millisecondsSinceEpoch) {
         timeMovedForward = true;
         break;
       }
     }
     Expect.equals(true, timeMovedForward);
-    Expect.isFalse(t1.isUtc());
+    Expect.isFalse(t1.isUtc);
   }
 
   static void testValue() {
     var dt1 = new Date.now();
-    var value = dt1.value;
-    var dt2 = new Date.fromEpoch(value);
-    Expect.equals(value, dt2.value);
+    var millisecondsSinceEpoch = dt1.millisecondsSinceEpoch;
+    var dt2 = new Date.fromMillisecondsSinceEpoch(millisecondsSinceEpoch);
+    Expect.equals(millisecondsSinceEpoch, dt2.millisecondsSinceEpoch);
   }
 
   static void testFarAwayDates() {
-    Date dt = new Date.fromEpoch(1000000000000001, isUtc: true);
+    Date dt =
+        new Date.fromMillisecondsSinceEpoch(1000000000000001, isUtc: true);
     Expect.equals(33658, dt.year);
     Expect.equals(9, dt.month);
     Expect.equals(27, dt.day);
-    Expect.equals(1, dt.hours);
-    Expect.equals(46, dt.minutes);
-    Expect.equals(40, dt.seconds);
-    Expect.equals(1, dt.milliseconds);
-    dt = new Date.fromEpoch(-1000000000000001, isUtc: true);
+    Expect.equals(1, dt.hour);
+    Expect.equals(46, dt.minute);
+    Expect.equals(40, dt.second);
+    Expect.equals(1, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-1000000000000001, isUtc: true);
     Expect.equals(-29719, dt.year);
     Expect.equals(4, dt.month);
     Expect.equals(5, dt.day);
-    Expect.equals(22, dt.hours);
-    Expect.equals(13, dt.minutes);
-    Expect.equals(19, dt.seconds);
-    Expect.equals(999, dt.milliseconds);
+    Expect.equals(22, dt.hour);
+    Expect.equals(13, dt.minute);
+    Expect.equals(19, dt.second);
+    Expect.equals(999, dt.millisecond);
     // Same with local zone.
-    dt = new Date.fromEpoch(1000000000000001);
+    dt = new Date.fromMillisecondsSinceEpoch(1000000000000001);
     Expect.equals(33658, dt.year);
     Expect.equals(9, dt.month);
     Expect.equals(true, dt.day == 27 || dt.day == 26);
-    // Not much we can test for local hours.
-    Expect.equals(true, dt.hours >= 0 && dt.hours < 24);
-    // Timezones can have offsets down to 15 minutes.
-    Expect.equals(true, dt.minutes % 15 == 46 % 15);
-    Expect.equals(40, dt.seconds);
-    Expect.equals(1, dt.milliseconds);
-    dt = new Date.fromEpoch(-1000000000000001);
+    // Not much we can test for local hour.
+    Expect.equals(true, dt.hour >= 0 && dt.hour < 24);
+    // Timezones can have offsets down to 15 minute.
+    Expect.equals(true, dt.minute % 15 == 46 % 15);
+    Expect.equals(40, dt.second);
+    Expect.equals(1, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-1000000000000001);
     Expect.equals(-29719, dt.year);
     Expect.equals(4, dt.month);
     Expect.equals(true, 5 == dt.day || 6 == dt.day);
-    // Not much we can test for local hours.
-    Expect.equals(true, dt.hours >= 0 && dt.hours < 24);
-    // Timezones can have offsets down to 15 minutes.
-    Expect.equals(true, dt.minutes % 15 == 13);
-    Expect.equals(19, dt.seconds);
-    Expect.equals(999, dt.milliseconds);
+    // Not much we can test for local hour.
+    Expect.equals(true, dt.hour >= 0 && dt.hour < 24);
+    // Timezones can have offsets down to 15 minute.
+    Expect.equals(true, dt.minute % 15 == 13);
+    Expect.equals(19, dt.second);
+    Expect.equals(999, dt.millisecond);
   }
 
   static void testEquivalentYears() {
     // All hardcoded values come from V8. This means that the values are not
     // necessarily correct (see limitations of Date object in
     // EcmaScript 15.9.1 and in particular 15.9.1.8/9).
-    Date dt = new Date.fromEpoch(-31485600000, isUtc: true);
+    Date dt = new Date.fromMillisecondsSinceEpoch(-31485600000, isUtc: true);
     Expect.equals(1969, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-63108000000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-63108000000, isUtc: true);
     Expect.equals(1968, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-94644000000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-94644000000, isUtc: true);
     Expect.equals(1967, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-126180000000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-126180000000, isUtc: true);
     Expect.equals(1966, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-157716000000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-157716000000, isUtc: true);
     Expect.equals(1965, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-2177402400000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-2177402400000, isUtc: true);
     Expect.equals(1901, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-5333076000000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-5333076000000, isUtc: true);
     Expect.equals(1801, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-8520285600000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-8520285600000, isUtc: true);
     Expect.equals(1700, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-14831719200000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-14831719200000, isUtc: true);
     Expect.equals(1500, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-59011408800000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-59011408800000, isUtc: true);
     Expect.equals(100, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(14, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-62011408800000, isUtc: true);
+    Expect.equals(14, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-62011408800000, isUtc: true);
     Expect.equals(4, dt.year);
     Expect.equals(12, dt.month);
     Expect.equals(8, dt.day);
-    Expect.equals(8, dt.hours);
-    Expect.equals(40, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-64011408800000, isUtc: true);
+    Expect.equals(8, dt.hour);
+    Expect.equals(40, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-64011408800000, isUtc: true);
     Expect.equals(-59, dt.year);
     Expect.equals(7, dt.month);
     Expect.equals(24, dt.day);
-    Expect.equals(5, dt.hours);
-    Expect.equals(6, dt.minutes);
-    Expect.equals(40, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
+    Expect.equals(5, dt.hour);
+    Expect.equals(6, dt.minute);
+    Expect.equals(40, dt.second);
+    Expect.equals(0, dt.millisecond);
     final int SECONDS_YEAR_2035 = 2051222400;
-    dt = new Date.fromEpoch(SECONDS_YEAR_2035 * 1000 + 1, isUtc: true);
+    dt = new Date.fromMillisecondsSinceEpoch(SECONDS_YEAR_2035 * 1000 + 1,
+                                             isUtc: true);
     Expect.equals(2035, dt.year);
     Expect.equals(1, dt.month);
     Expect.equals(1, dt.day);
-    Expect.equals(0, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(1, dt.milliseconds);
-    dt = new Date.fromEpoch(SECONDS_YEAR_2035 * 1000 - 1, isUtc: true);
+    Expect.equals(0, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(1, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(SECONDS_YEAR_2035 * 1000 - 1,
+                                             isUtc: true);
     Expect.equals(2034, dt.year);
     Expect.equals(12, dt.month);
     Expect.equals(31, dt.day);
-    Expect.equals(23, dt.hours);
-    Expect.equals(59, dt.minutes);
-    Expect.equals(59, dt.seconds);
-    Expect.equals(999, dt.milliseconds);
+    Expect.equals(23, dt.hour);
+    Expect.equals(59, dt.minute);
+    Expect.equals(59, dt.second);
+    Expect.equals(999, dt.millisecond);
     dt = new Date(2035, 1, 1, 0, 0, 0, 1, isUtc: true);
-    Expect.equals(SECONDS_YEAR_2035 * 1000 + 1, dt.value);
+    Expect.equals(SECONDS_YEAR_2035 * 1000 + 1, dt.millisecondsSinceEpoch);
     dt = new Date(2034, 12, 31, 23, 59, 59, 999, isUtc: true);
-    Expect.equals(SECONDS_YEAR_2035 * 1000 - 1, dt.value);
-    dt = new Date.fromEpoch(SECONDS_YEAR_2035 * 1000 + 1);
+    Expect.equals(SECONDS_YEAR_2035 * 1000 - 1, dt.millisecondsSinceEpoch);
+    dt = new Date.fromMillisecondsSinceEpoch(SECONDS_YEAR_2035 * 1000 + 1);
     Expect.equals(true, (2035 == dt.year && 1 == dt.month && 1 == dt.day) ||
                         (2034 == dt.year && 12 == dt.month && 31 == dt.day));
-    Expect.equals(0, dt.seconds);
-    Expect.equals(1, dt.milliseconds);
+    Expect.equals(0, dt.second);
+    Expect.equals(1, dt.millisecond);
     Date dt2 = new Date(
-        dt.year, dt.month, dt.day, dt.hours, dt.minutes, dt.seconds,
-        dt.milliseconds);
-    Expect.equals(dt.value, dt2.value);
-    dt = new Date.fromEpoch(SECONDS_YEAR_2035 * 1000 - 1);
+        dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
+        dt.millisecond);
+    Expect.equals(dt.millisecondsSinceEpoch, dt2.millisecondsSinceEpoch);
+    dt = new Date.fromMillisecondsSinceEpoch(SECONDS_YEAR_2035 * 1000 - 1);
     Expect.equals(true, (2035 == dt.year && 1 == dt.month && 1 == dt.day) ||
                         (2034 == dt.year && 12 == dt.month && 31 == dt.day));
-    Expect.equals(59, dt.seconds);
-    Expect.equals(999, dt.milliseconds);
+    Expect.equals(59, dt.second);
+    Expect.equals(999, dt.millisecond);
     dt2 = new Date(
-        dt.year, dt.month, dt.day, dt.hours, dt.minutes, dt.seconds,
-        dt.milliseconds);
-    Expect.equals(dt.value, dt2.value);
-    dt = new Date.fromEpoch(2100000000 * 1000, isUtc: true);
+        dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
+        dt.millisecond);
+    Expect.equals(dt.millisecondsSinceEpoch, dt2.millisecondsSinceEpoch);
+    dt = new Date.fromMillisecondsSinceEpoch(2100000000 * 1000, isUtc: true);
     Expect.equals(2036, dt.year);
     Expect.equals(7, dt.month);
     Expect.equals(18, dt.day);
-    Expect.equals(13, dt.hours);
-    Expect.equals(20, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
+    Expect.equals(13, dt.hour);
+    Expect.equals(20, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
     // Internally this will use the maximum value for the native calls.
     dt = new Date(2036, 7, 18, 13, 20);
     Expect.equals(2036, dt.year);
     Expect.equals(7, dt.month);
     Expect.equals(18, dt.day);
-    Expect.equals(13, dt.hours);
-    Expect.equals(20, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
+    Expect.equals(13, dt.hour);
+    Expect.equals(20, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
     Expect.equals("2036-07-18 13:20:00.000", dt.toString());
   }
 
   static void testExtremes() {
-    var dt = new Date.fromEpoch(8640000000000000, isUtc: true);
+    var dt =
+        new Date.fromMillisecondsSinceEpoch(8640000000000000, isUtc: true);
     Expect.equals(275760, dt.year);
     Expect.equals(9, dt.month);
     Expect.equals(13, dt.day);
-    Expect.equals(0, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    dt = new Date.fromEpoch(-8640000000000000, isUtc: true);
+    Expect.equals(0, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
+    dt = new Date.fromMillisecondsSinceEpoch(-8640000000000000, isUtc: true);
     Expect.equals(-271821, dt.year);
     Expect.equals(4, dt.month);
     Expect.equals(20, dt.day);
-    Expect.equals(0, dt.hours);
-    Expect.equals(0, dt.minutes);
-    Expect.equals(0, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
+    Expect.equals(0, dt.hour);
+    Expect.equals(0, dt.minute);
+    Expect.equals(0, dt.second);
+    Expect.equals(0, dt.millisecond);
     // Make sure that we can build the extreme dates in local too.
-    dt = new Date.fromEpoch(8640000000000000);
-    dt = new Date(dt.year, dt.month, dt.day, dt.hours, dt.minutes);
-    Expect.equals(8640000000000000, dt.value);
-    dt = new Date.fromEpoch(-8640000000000000);
-    dt = new Date(dt.year, dt.month, dt.day, dt.hours, dt.minutes);
-    Expect.equals(-8640000000000000, dt.value);
-    Expect.throws(() => new Date.fromEpoch(8640000000000001, isUtc: true));
-    Expect.throws(() => new Date.fromEpoch(-8640000000000001, isUtc: true));
-    Expect.throws(() => new Date.fromEpoch(8640000000000001));
-    Expect.throws(() => new Date.fromEpoch(-8640000000000001));
-    dt = new Date.fromEpoch(8640000000000000);
+    dt = new Date.fromMillisecondsSinceEpoch(8640000000000000);
+    dt = new Date(dt.year, dt.month, dt.day, dt.hour, dt.minute);
+    Expect.equals(8640000000000000, dt.millisecondsSinceEpoch);
+    dt = new Date.fromMillisecondsSinceEpoch(-8640000000000000);
+    dt = new Date(dt.year, dt.month, dt.day, dt.hour, dt.minute);
+    Expect.equals(-8640000000000000, dt.millisecondsSinceEpoch);
+    Expect.throws(() => new Date.fromMillisecondsSinceEpoch(8640000000000001,
+                                                            isUtc: true));
+    Expect.throws(() => new Date.fromMillisecondsSinceEpoch(-8640000000000001,
+                                                            isUtc: true));
+    Expect.throws(() => new Date.fromMillisecondsSinceEpoch(8640000000000001));
+    Expect.throws(
+        () => new Date.fromMillisecondsSinceEpoch(-8640000000000001));
+    dt = new Date.fromMillisecondsSinceEpoch(8640000000000000);
     Expect.throws(() => new Date(dt.year, dt.month, dt.day,
-                                 dt.hours, dt.minutes, 0, 1));
-    dt = new Date.fromEpoch(-8640000000000000);
+                                 dt.hour, dt.minute, 0, 1));
+    dt = new Date.fromMillisecondsSinceEpoch(-8640000000000000);
     // TODO(floitsch): Update comment after refactoring.
     // This test currently fails because the arguments must not be negative.
     // However we are going to allow negative (and overflowing) arguments and
     // this line will then throw for the correct reason.
     Expect.throws(() => new Date(dt.year, dt.month, dt.day,
-                                 dt.hours, dt.minutes, 0, -1));
+                                 dt.hour, dt.minute, 0, -1));
   }
 
   static void testUTCGetters() {
-    var dt = new Date.fromEpoch(1305140315000, isUtc: true);
+    var dt = new Date.fromMillisecondsSinceEpoch(1305140315000, isUtc: true);
     Expect.equals(2011, dt.year);
     Expect.equals(5, dt.month);
     Expect.equals(11, dt.day);
-    Expect.equals(18, dt.hours);
-    Expect.equals(58, dt.minutes);
-    Expect.equals(35, dt.seconds);
-    Expect.equals(0, dt.milliseconds);
-    Expect.equals(true, dt.isUtc());
-    Expect.equals(1305140315000, dt.value);
-    dt = new Date.fromEpoch(-9999999, isUtc: true);
+    Expect.equals(18, dt.hour);
+    Expect.equals(58, dt.minute);
+    Expect.equals(35, dt.second);
+    Expect.equals(0, dt.millisecond);
+    Expect.equals(true, dt.isUtc);
+    Expect.equals(1305140315000, dt.millisecondsSinceEpoch);
+    dt = new Date.fromMillisecondsSinceEpoch(-9999999, isUtc: true);
     Expect.equals(1969, dt.year);
     Expect.equals(12, dt.month);
     Expect.equals(31, dt.day);
-    Expect.equals(21, dt.hours);
-    Expect.equals(13, dt.minutes);
-    Expect.equals(20, dt.seconds);
-    Expect.equals(1, dt.milliseconds);
+    Expect.equals(21, dt.hour);
+    Expect.equals(13, dt.minute);
+    Expect.equals(20, dt.second);
+    Expect.equals(1, dt.millisecond);
   }
 
   static void testLocalGetters() {
-    var dt1 = new Date.fromEpoch(1305140315000);
+    var dt1 = new Date.fromMillisecondsSinceEpoch(1305140315000);
     var dt2 = new Date(dt1.year, dt1.month, dt1.day,
-                       dt1.hours, dt1.minutes, dt1.seconds,
-                       dt1.milliseconds,
+                       dt1.hour, dt1.minute, dt1.second,
+                       dt1.millisecond,
                        isUtc: true);
     Duration zoneOffset = dt1.difference(dt2);
     Expect.equals(true, zoneOffset.inDays == 0);
     Expect.equals(true, zoneOffset.inHours.abs() <= 12);
     Expect.equals(dt1.year, dt2.year);
     Expect.equals(dt1.month, dt2.month);
     Expect.equals(true, (dt1.day - dt2.day).abs() <= 1);
-    Expect.equals(true, dt1.hours < 24);
+    Expect.equals(true, dt1.hour < 24);
     // There are timezones with 0.5 or 0.25 hour offsets.
     Expect.equals(true,
-                  (dt1.minutes == dt2.minutes) ||
-                  ((dt1.minutes - dt2.minutes).abs() == 30) ||
-                  ((dt1.minutes - dt2.minutes).abs() == 15));
-    Expect.equals(dt1.seconds, dt2.seconds);
-    Expect.equals(dt1.milliseconds, dt2.milliseconds);
+                  (dt1.minute == dt2.minute) ||
+                  ((dt1.minute - dt2.minute).abs() == 30) ||
+                  ((dt1.minute - dt2.minute).abs() == 15));
+    Expect.equals(dt1.second, dt2.second);
+    Expect.equals(dt1.millisecond, dt2.millisecond);
   }
 
   static void testConstructors() {
     var dt0 = new Date(2011, 5, 11, 18, 58, 35, 0, isUtc: true);
-    Expect.equals(1305140315000, dt0.value);
-    var dt1 = new Date.fromEpoch(1305140315000);
-    Expect.equals(dt1.value, dt0.value);
+    Expect.equals(1305140315000, dt0.millisecondsSinceEpoch);
+    var dt1 = new Date.fromMillisecondsSinceEpoch(1305140315000);
+    Expect.equals(dt1.millisecondsSinceEpoch, dt0.millisecondsSinceEpoch);
     Expect.equals(true, dt1 == dt0);
-    var dt3 = new Date(dt1.year, dt1.month, dt1.day, dt1.hours, dt1.minutes,
-                       dt1.seconds, dt1.milliseconds);
-    Expect.equals(dt1.value, dt3.value);
+    var dt3 = new Date(dt1.year, dt1.month, dt1.day, dt1.hour, dt1.minute,
+                       dt1.second, dt1.millisecond);
+    Expect.equals(dt1.millisecondsSinceEpoch, dt3.millisecondsSinceEpoch);
     Expect.equals(true, dt1 == dt3);
     dt3 = new Date(
-        dt1.year, dt1.month, dt1.day, dt1.hours, dt1.minutes,
-        dt1.seconds, dt1.milliseconds);
-    Expect.equals(dt1.value, dt3.value);
+        dt1.year, dt1.month, dt1.day, dt1.hour, dt1.minute,
+        dt1.second, dt1.millisecond);
+    Expect.equals(dt1.millisecondsSinceEpoch, dt3.millisecondsSinceEpoch);
     Expect.equals(true, dt1 == dt3);
     var dt2 = dt1.toLocal();
-    dt3 = new Date(2011, 5, dt1.day, dt1.hours, dt1.minutes, 35, 0);
-    Expect.equals(dt2.value, dt3.value);
+    dt3 = new Date(2011, 5, dt1.day, dt1.hour, dt1.minute, 35, 0);
+    Expect.equals(dt2.millisecondsSinceEpoch, dt3.millisecondsSinceEpoch);
     Expect.equals(true, dt2 == dt3);
-    dt1 = new Date.fromEpoch(-9999999, isUtc: true);
+    dt1 = new Date.fromMillisecondsSinceEpoch(-9999999, isUtc: true);
     dt3 = new Date(
-        dt1.year, dt1.month, dt1.day, dt1.hours, dt1.minutes,
-        dt1.seconds, dt1.milliseconds, isUtc: true);
-    Expect.equals(dt1.value, dt3.value);
+        dt1.year, dt1.month, dt1.day, dt1.hour, dt1.minute,
+        dt1.second, dt1.millisecond, isUtc: true);
+    Expect.equals(dt1.millisecondsSinceEpoch, dt3.millisecondsSinceEpoch);
     dt3 = new Date(99, 1, 2, 10, 11, 12, 0, isUtc: true);
     Expect.equals(99, dt3.year);
     Expect.equals(1, dt3.month);
     Expect.equals(2, dt3.day);
-    Expect.equals(10, dt3.hours);
-    Expect.equals(11, dt3.minutes);
-    Expect.equals(12, dt3.seconds);
-    Expect.equals(0, dt3.milliseconds);
-    Expect.equals(true, dt3.isUtc());
+    Expect.equals(10, dt3.hour);
+    Expect.equals(11, dt3.minute);
+    Expect.equals(12, dt3.second);
+    Expect.equals(0, dt3.millisecond);
+    Expect.equals(true, dt3.isUtc);
     var dt4 = new Date(99, 1, 2);
     Expect.equals(99, dt4.year);
     Expect.equals(1, dt4.month);
     Expect.equals(2, dt4.day);
-    Expect.equals(0, dt4.hours);
-    Expect.equals(0, dt4.minutes);
-    Expect.equals(0, dt4.seconds);
-    Expect.equals(0, dt4.milliseconds);
-    Expect.isFalse(dt4.isUtc());
+    Expect.equals(0, dt4.hour);
+    Expect.equals(0, dt4.minute);
+    Expect.equals(0, dt4.second);
+    Expect.equals(0, dt4.millisecond);
+    Expect.isFalse(dt4.isUtc);
     var dt5 = new Date(99, 1, 2, isUtc: true);
     Expect.equals(99, dt5.year);
     Expect.equals(1, dt5.month);
     Expect.equals(2, dt5.day);
-    Expect.equals(0, dt5.hours);
-    Expect.equals(0, dt5.minutes);
-    Expect.equals(0, dt5.seconds);
-    Expect.equals(0, dt5.milliseconds);
-    Expect.isTrue(dt5.isUtc());
+    Expect.equals(0, dt5.hour);
+    Expect.equals(0, dt5.minute);
+    Expect.equals(0, dt5.second);
+    Expect.equals(0, dt5.millisecond);
+    Expect.isTrue(dt5.isUtc);
     var dt6 = new Date(2012, 2, 27, 13, 27, 0);
     Expect.equals(2012, dt6.year);
     Expect.equals(2, dt6.month);
     Expect.equals(27, dt6.day);
-    Expect.equals(13, dt6.hours);
-    Expect.equals(27, dt6.minutes);
-    Expect.equals(0, dt6.seconds);
-    Expect.equals(0, dt6.milliseconds);
-    Expect.isFalse(dt6.isUtc());
+    Expect.equals(13, dt6.hour);
+    Expect.equals(27, dt6.minute);
+    Expect.equals(0, dt6.second);
+    Expect.equals(0, dt6.millisecond);
+    Expect.isFalse(dt6.isUtc);
     var dt7 = new Date(2012, 2, 27, 13, 27, 0, isUtc: true);
     Expect.equals(2012, dt7.year);
     Expect.equals(2, dt7.month);
     Expect.equals(27, dt7.day);
-    Expect.equals(13, dt7.hours);
-    Expect.equals(27, dt7.minutes);
-    Expect.equals(0, dt7.seconds);
-    Expect.equals(0, dt7.milliseconds);
-    Expect.isTrue(dt7.isUtc());
+    Expect.equals(13, dt7.hour);
+    Expect.equals(27, dt7.minute);
+    Expect.equals(0, dt7.second);
+    Expect.equals(0, dt7.millisecond);
+    Expect.isTrue(dt7.isUtc);
   }
 
   static void testChangeTimeZone() {
-    var dt1 = new Date.fromEpoch(1305140315000);
+    var dt1 = new Date.fromMillisecondsSinceEpoch(1305140315000);
     var dt2 = dt1.toUtc();
-    Expect.equals(dt1.value, dt2.value);
-    var dt3 = new Date.fromEpoch(1305140315000, isUtc: true);
-    Expect.equals(dt1.value, dt3.value);
+    Expect.equals(dt1.millisecondsSinceEpoch, dt2.millisecondsSinceEpoch);
+    var dt3 = new Date.fromMillisecondsSinceEpoch(1305140315000, isUtc: true);
+    Expect.equals(dt1.millisecondsSinceEpoch, dt3.millisecondsSinceEpoch);
     Expect.equals(dt2.year, dt3.year);
     Expect.equals(dt2.month, dt3.month);
     Expect.equals(dt2.day, dt3.day);
-    Expect.equals(dt2.hours, dt3.hours);
-    Expect.equals(dt2.minutes, dt3.minutes);
-    Expect.equals(dt2.seconds, dt3.seconds);
-    Expect.equals(dt2.milliseconds, dt3.milliseconds);
+    Expect.equals(dt2.hour, dt3.hour);
+    Expect.equals(dt2.minute, dt3.minute);
+    Expect.equals(dt2.second, dt3.second);
+    Expect.equals(dt2.millisecond, dt3.millisecond);
     var dt4 = dt3.toLocal();
     Expect.equals(dt1.year, dt4.year);
     Expect.equals(dt1.month, dt4.month);
     Expect.equals(dt1.day, dt4.day);
-    Expect.equals(dt1.hours, dt4.hours);
-    Expect.equals(dt1.minutes, dt4.minutes);
-    Expect.equals(dt1.seconds, dt4.seconds);
-    Expect.equals(dt1.milliseconds, dt4.milliseconds);
+    Expect.equals(dt1.hour, dt4.hour);
+    Expect.equals(dt1.minute, dt4.minute);
+    Expect.equals(dt1.second, dt4.second);
+    Expect.equals(dt1.millisecond, dt4.millisecond);
   }
 
   static void testSubAdd() {
-    var dt1 = new Date.fromEpoch(1305140315000, isUtc: true);
+    var dt1 = new Date.fromMillisecondsSinceEpoch(1305140315000, isUtc: true);
     var dt2 = dt1.add(new Duration(milliseconds:
         3 * Duration.MILLISECONDS_PER_SECOND + 5));
     Expect.equals(dt1.year, dt2.year);
     Expect.equals(dt1.month, dt2.month);
     Expect.equals(dt1.day, dt2.day);
-    Expect.equals(dt1.hours, dt2.hours);
-    Expect.equals(dt1.minutes, dt2.minutes);
-    Expect.equals(dt1.seconds + 3, dt2.seconds);
-    Expect.equals(dt1.milliseconds + 5, dt2.milliseconds);
+    Expect.equals(dt1.hour, dt2.hour);
+    Expect.equals(dt1.minute, dt2.minute);
+    Expect.equals(dt1.second + 3, dt2.second);
+    Expect.equals(dt1.millisecond + 5, dt2.millisecond);
     var dt3 = dt2.subtract(new Duration(milliseconds:
         3 * Duration.MILLISECONDS_PER_SECOND + 5));
     Expect.equals(true, dt1 == dt3);
     Expect.equals(false, dt1 == dt2);
   }
 
   static void testDateStrings() {
     // TODO(floitsch): Clean up the Date API that deals with strings.
     var dt1 = new Date.fromString("2011-05-11 18:58:35Z");
-    Expect.equals(1305140315000, dt1.value);
-    Expect.isTrue(dt1.isUtc());
+    Expect.equals(1305140315000, dt1.millisecondsSinceEpoch);
+    Expect.isTrue(dt1.isUtc);
     dt1 = new Date.fromString("20110511 18:58:35z");
-    Expect.equals(1305140315000, dt1.value);
-    Expect.isTrue(dt1.isUtc());
+    Expect.equals(1305140315000, dt1.millisecondsSinceEpoch);
+    Expect.isTrue(dt1.isUtc);
     dt1 = new Date.fromString("+20110511 18:58:35z");
-    Expect.equals(1305140315000, dt1.value);
-    Expect.isTrue(dt1.isUtc());
+    Expect.equals(1305140315000, dt1.millisecondsSinceEpoch);
+    Expect.isTrue(dt1.isUtc);
     var str = dt1.toString();
     var dt2 = new Date.fromString(str);
     Expect.equals(true, dt1 == dt2);
     var dt3 = dt1.toUtc();
     str = dt3.toString();
     Expect.equals("2011-05-11 18:58:35.000Z", str);
     var dt4 = new Date.fromString("-1234-01-01 00:00:00Z");
     Expect.equals(-1234, dt4.year);
     Expect.equals(1, dt4.month);
     Expect.equals(1, dt4.day);
-    Expect.equals(0, dt4.hours);
-    Expect.equals(0, dt4.minutes);
-    Expect.equals(0, dt4.seconds);
-    Expect.equals(0, dt4.milliseconds);
-    Expect.isTrue(dt4.isUtc());
+    Expect.equals(0, dt4.hour);
+    Expect.equals(0, dt4.minute);
+    Expect.equals(0, dt4.second);
+    Expect.equals(0, dt4.millisecond);
+    Expect.isTrue(dt4.isUtc);
     var dt5 = new Date.fromString("0099-01-02");
     Expect.equals(99, dt5.year);
     Expect.equals(1, dt5.month);
     Expect.equals(2, dt5.day);
-    Expect.equals(0, dt5.hours);
-    Expect.equals(0, dt5.minutes);
-    Expect.equals(0, dt5.seconds);
-    Expect.equals(0, dt5.milliseconds);
-    Expect.isFalse(dt5.isUtc());
+    Expect.equals(0, dt5.hour);
+    Expect.equals(0, dt5.minute);
+    Expect.equals(0, dt5.second);
+    Expect.equals(0, dt5.millisecond);
+    Expect.isFalse(dt5.isUtc);
     var dt6 = new Date.fromString("2012-01-01 00:00:10.012");
-    Expect.equals(12, dt6.milliseconds);
+    Expect.equals(12, dt6.millisecond);
     dt6 = new Date.fromString("2012-01-01 00:00:10.003");
-    Expect.equals(3, dt6.milliseconds);
+    Expect.equals(3, dt6.millisecond);
     dt6 = new Date.fromString("2012-01-01 00:00:10.5");
-    Expect.equals(500, dt6.milliseconds);
+    Expect.equals(500, dt6.millisecond);
     dt6 = new Date.fromString("2012-01-01 00:00:10.003Z");
-    Expect.equals(3, dt6.milliseconds);
+    Expect.equals(3, dt6.millisecond);
     dt6 = new Date.fromString("2012-01-01 00:00:10.5z");
-    Expect.equals(500, dt6.milliseconds);
+    Expect.equals(500, dt6.millisecond);
     var dt7 = new Date.fromString("2011-05-11T18:58:35Z");
-    Expect.equals(1305140315000, dt7.value);
+    Expect.equals(1305140315000, dt7.millisecondsSinceEpoch);
     var dt8 = new Date.fromString("-1234-01-01T00:00:00Z");
     Expect.equals(-1234, dt8.year);
     Expect.equals(1, dt8.month);
     Expect.equals(1, dt8.day);
-    Expect.equals(0, dt8.hours);
-    Expect.equals(0, dt8.minutes);
-    Expect.equals(0, dt8.seconds);
-    Expect.equals(0, dt8.milliseconds);
-    Expect.isTrue(dt8.isUtc());
+    Expect.equals(0, dt8.hour);
+    Expect.equals(0, dt8.minute);
+    Expect.equals(0, dt8.second);
+    Expect.equals(0, dt8.millisecond);
+    Expect.isTrue(dt8.isUtc);
     var dt9 = new Date.fromString("-1234-01-01T00:00:00");
     Expect.equals(-1234, dt9.year);
     Expect.equals(1, dt9.month);
     Expect.equals(1, dt9.day);
-    Expect.equals(0, dt9.hours);
-    Expect.equals(0, dt9.minutes);
-    Expect.equals(0, dt9.seconds);
-    Expect.equals(0, dt9.milliseconds);
-    Expect.isFalse(dt9.isUtc());
+    Expect.equals(0, dt9.hour);
+    Expect.equals(0, dt9.minute);
+    Expect.equals(0, dt9.second);
+    Expect.equals(0, dt9.millisecond);
+    Expect.isFalse(dt9.isUtc);
     var dt10 = new Date.fromString("-12340101");
     Expect.equals(-1234, dt10.year);
     Expect.equals(1, dt10.month);
     Expect.equals(1, dt10.day);
-    Expect.equals(0, dt10.hours);
-    Expect.equals(0, dt10.minutes);
-    Expect.equals(0, dt10.seconds);
-    Expect.equals(0, dt10.milliseconds);
-    Expect.isFalse(dt10.isUtc());
+    Expect.equals(0, dt10.hour);
+    Expect.equals(0, dt10.minute);
+    Expect.equals(0, dt10.second);
+    Expect.equals(0, dt10.millisecond);
+    Expect.isFalse(dt10.isUtc);
     dt1 = new Date.fromString("2012-02-27 13:27:00");
     Expect.equals(2012, dt1.year);
     Expect.equals(2, dt1.month);
     Expect.equals(27, dt1.day);
-    Expect.equals(13, dt1.hours);
-    Expect.equals(27, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(0, dt1.milliseconds);
-    Expect.equals(false, dt1.isUtc());
+    Expect.equals(13, dt1.hour);
+    Expect.equals(27, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(0, dt1.millisecond);
+    Expect.equals(false, dt1.isUtc);
     dt1 = new Date.fromString("2012-02-27 13:27:00.423z");
     Expect.equals(2012, dt1.year);
     Expect.equals(2, dt1.month);
     Expect.equals(27, dt1.day);
-    Expect.equals(13, dt1.hours);
-    Expect.equals(27, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(423, dt1.milliseconds);
-    Expect.equals(true, dt1.isUtc());
+    Expect.equals(13, dt1.hour);
+    Expect.equals(27, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(423, dt1.millisecond);
+    Expect.equals(true, dt1.isUtc);
     dt1 = new Date.fromString("20120227 13:27:00");
     Expect.equals(2012, dt1.year);
     Expect.equals(2, dt1.month);
     Expect.equals(27, dt1.day);
-    Expect.equals(13, dt1.hours);
-    Expect.equals(27, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(0, dt1.milliseconds);
-    Expect.equals(false, dt1.isUtc());
+    Expect.equals(13, dt1.hour);
+    Expect.equals(27, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(0, dt1.millisecond);
+    Expect.equals(false, dt1.isUtc);
     dt1 = new Date.fromString("20120227T132700");
     Expect.equals(2012, dt1.year);
     Expect.equals(2, dt1.month);
     Expect.equals(27, dt1.day);
-    Expect.equals(13, dt1.hours);
-    Expect.equals(27, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(0, dt1.milliseconds);
-    Expect.equals(false, dt1.isUtc());
+    Expect.equals(13, dt1.hour);
+    Expect.equals(27, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(0, dt1.millisecond);
+    Expect.equals(false, dt1.isUtc);
     dt1 = new Date.fromString("20120227");
     Expect.equals(2012, dt1.year);
     Expect.equals(2, dt1.month);
     Expect.equals(27, dt1.day);
-    Expect.equals(0, dt1.hours);
-    Expect.equals(0, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(0, dt1.milliseconds);
-    Expect.equals(false, dt1.isUtc());
+    Expect.equals(0, dt1.hour);
+    Expect.equals(0, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(0, dt1.millisecond);
+    Expect.equals(false, dt1.isUtc);
     dt1 = new Date.fromString("2012-02-27T14Z");
     Expect.equals(2012, dt1.year);
     Expect.equals(2, dt1.month);
     Expect.equals(27, dt1.day);
-    Expect.equals(14, dt1.hours);
-    Expect.equals(0, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(0, dt1.milliseconds);
-    Expect.equals(true, dt1.isUtc());
+    Expect.equals(14, dt1.hour);
+    Expect.equals(0, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(0, dt1.millisecond);
+    Expect.equals(true, dt1.isUtc);
     dt1 = new Date.fromString("-123450101 00:00:00 Z");
     Expect.equals(-12345, dt1.year);
     Expect.equals(1, dt1.month);
     Expect.equals(1, dt1.day);
-    Expect.equals(0, dt1.hours);
-    Expect.equals(0, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(0, dt1.milliseconds);
-    Expect.equals(true, dt1.isUtc());
-    // We only support milliseconds. If the user supplies more data (the "51"
+    Expect.equals(0, dt1.hour);
+    Expect.equals(0, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(0, dt1.millisecond);
+    Expect.equals(true, dt1.isUtc);
+    // We only support millisecond. If the user supplies more data (the "51"
     // here), we round.
-    // If (eventually) we support more than just milliseconds this test could
+    // If (eventually) we support more than just millisecond this test could
     // fail. Please update the test in this case.
     dt1 = new Date.fromString("1999-01-02 23:59:59.99951");
     Expect.equals(1999, dt1.year);
     Expect.equals(1, dt1.month);
     Expect.equals(3, dt1.day);
-    Expect.equals(0, dt1.hours);
-    Expect.equals(0, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(0, dt1.milliseconds);
-    Expect.equals(false, dt1.isUtc());
+    Expect.equals(0, dt1.hour);
+    Expect.equals(0, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(0, dt1.millisecond);
+    Expect.equals(false, dt1.isUtc);
     dt1 = new Date.fromString("1999-01-02 23:58:59.99951Z");
     Expect.equals(1999, dt1.year);
     Expect.equals(1, dt1.month);
     Expect.equals(2, dt1.day);
-    Expect.equals(23, dt1.hours);
-    Expect.equals(59, dt1.minutes);
-    Expect.equals(0, dt1.seconds);
-    Expect.equals(0, dt1.milliseconds);
-    Expect.equals(true, dt1.isUtc());
+    Expect.equals(23, dt1.hour);
+    Expect.equals(59, dt1.minute);
+    Expect.equals(0, dt1.second);
+    Expect.equals(0, dt1.millisecond);
+    Expect.equals(true, dt1.isUtc);
     dt1 = new Date.fromString("0009-09-09 09:09:09.009Z");
     Expect.equals(9, dt1.year);
     Expect.equals(9, dt1.month);
     Expect.equals(9, dt1.day);
-    Expect.equals(9, dt1.hours);
-    Expect.equals(9, dt1.minutes);
-    Expect.equals(9, dt1.seconds);
-    Expect.equals(9, dt1.milliseconds);
-    Expect.equals(true, dt1.isUtc());
+    Expect.equals(9, dt1.hour);
+    Expect.equals(9, dt1.minute);
+    Expect.equals(9, dt1.second);
+    Expect.equals(9, dt1.millisecond);
+    Expect.equals(true, dt1.isUtc);
   }
 
   static void testWeekday() {
     // 2011-10-06 is Summertime.
     var d = new Date(2011, 10, 6, 0, 45, 37, 0);
     Expect.equals(Date.THU, d.weekday);
     d = new Date(2011, 10, 6, 0, 45, 37, 0, isUtc: true);
     Expect.equals(Date.THU, d.weekday);
     d = new Date(2011, 10, 5, 23, 45, 37, 0);
     Expect.equals(Date.WED, d.weekday);
@@ skipping 32 matching lines @@
     testEquivalentYears();
     testExtremes();
     testFarAwayDates();
     testWeekday();
   }
 }
 
 main() {
   DateTest.testMain();
 }