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https://github.com/samsonjs/strftime.git
synced 2026-03-25 09:05:48 +00:00
Avoid glitches around DST change by inverting utc logic
This commit is contained in:
Raimund Bauer
parent
f8e5b11c9b
commit
7d4802425e
1 changed files with 32 additions and 28 deletions
60
strftime.js
60
strftime.js
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@ -166,7 +166,9 @@
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if (_useUtcBasedDate) {
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// how to avoid duplication of date instantiation for utc here?
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// we tied to getTimezoneOffset of the current date
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_cachedDate = new Date(_cachedDateTimestamp + getTimestampToUtcOffsetFor(_cachedDate) + _customTimezoneOffset);
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//_cachedDate = new Date(_cachedDateTimestamp + getTimestampToUtcOffsetFor(_cachedDate) + _customTimezoneOffset);
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} else {
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_cachedDate = new Date(_cachedDateTimestamp - getTimestampToUtcOffsetFor(_cachedDate) - _customTimezoneOffset);
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}
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}
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else {
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@ -178,7 +180,9 @@
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timestamp = date.getTime();
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if (_useUtcBasedDate) {
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date = new Date(date.getTime() + getTimestampToUtcOffsetFor(date) + _customTimezoneOffset);
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//date = new Date(date.getTime() + getTimestampToUtcOffsetFor(date) + _customTimezoneOffset);
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} else {
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date = new Date(date.getTime() - getTimestampToUtcOffsetFor(date) - _customTimezoneOffset);
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}
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}
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@ -230,19 +234,19 @@
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// 'Thursday'
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// case 'A':
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case 65:
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resultString += locale.days[date.getDay()];
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resultString += locale.days[date.getUTCDay()];
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break;
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// 'January'
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// case 'B':
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case 66:
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resultString += locale.months[date.getMonth()];
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resultString += locale.months[date.getUTCMonth()];
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break;
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// '19'
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// case 'C':
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case 67:
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resultString += padTill2(Math.floor(date.getFullYear() / 100), padding);
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resultString += padTill2(Math.floor(date.getUTCFullYear() / 100), padding);
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break;
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// '01/01/70'
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@ -260,13 +264,13 @@
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// '00'
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// case 'H':
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case 72:
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resultString += padTill2(date.getHours(), padding);
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resultString += padTill2(date.getUTCHours(), padding);
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break;
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// '12'
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// case 'I':
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case 73:
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resultString += padTill2(hours12(date.getHours()), padding);
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resultString += padTill2(hours12(date.getUTCHours()), padding);
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break;
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// '000'
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@ -278,13 +282,13 @@
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// '00'
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// case 'M':
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case 77:
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resultString += padTill2(date.getMinutes(), padding);
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resultString += padTill2(date.getUTCMinutes(), padding);
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break;
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// 'am'
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// case 'P':
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case 80:
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resultString += date.getHours() < 12 ? locale.am : locale.pm;
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resultString += date.getUTCHours() < 12 ? locale.am : locale.pm;
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break;
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// '00:00'
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@ -296,7 +300,7 @@
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// '00'
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// case 'S':
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case 83:
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resultString += padTill2(date.getSeconds(), padding);
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resultString += padTill2(date.getUTCSeconds(), padding);
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break;
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// '00:00:00'
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@ -326,7 +330,7 @@
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// '1970'
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// case 'Y':
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case 89:
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resultString += date.getFullYear();
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resultString += date.getUTCFullYear();
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break;
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// 'GMT'
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@ -345,13 +349,13 @@
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// 'Thu'
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// case 'a':
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case 97:
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resultString += locale.shortDays[date.getDay()];
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resultString += locale.shortDays[date.getUTCDay()];
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break;
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// 'Jan'
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// case 'b':
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case 98:
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resultString += locale.shortMonths[date.getMonth()];
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resultString += locale.shortMonths[date.getUTCMonth()];
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break;
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// ''
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@ -363,25 +367,25 @@
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// '01'
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// case 'd':
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case 100:
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resultString += padTill2(date.getDate(), padding);
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resultString += padTill2(date.getUTCDate(), padding);
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break;
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// ' 1'
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// case 'e':
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case 101:
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resultString += padTill2(date.getDate(), padding == null ? ' ' : padding);
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resultString += padTill2(date.getUTCDate(), padding == null ? ' ' : padding);
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break;
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// 'Jan'
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// case 'h':
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case 104:
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resultString += locale.shortMonths[date.getMonth()];
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resultString += locale.shortMonths[date.getUTCMonth()];
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break;
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// '000'
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// case 'j':
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case 106:
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var y = new Date(date.getFullYear(), 0, 1);
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var y = new Date(date.getUTCFullYear(), 0, 1);
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var day = Math.ceil((date.getTime() - y.getTime()) / (1000 * 60 * 60 * 24));
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resultString += padTill3(day);
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break;
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@ -389,19 +393,19 @@
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// ' 0'
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// case 'k':
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case 107:
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resultString += padTill2(date.getHours(), padding == null ? ' ' : padding);
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resultString += padTill2(date.getUTCHours(), padding == null ? ' ' : padding);
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break;
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// '12'
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// case 'l':
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case 108:
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resultString += padTill2(hours12(date.getHours()), padding == null ? ' ' : padding);
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resultString += padTill2(hours12(date.getUTCHours()), padding == null ? ' ' : padding);
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break;
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// '01'
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// case 'm':
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case 109:
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resultString += padTill2(date.getMonth() + 1, padding);
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resultString += padTill2(date.getUTCMonth() + 1, padding);
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break;
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// '\n'
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@ -413,13 +417,13 @@
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// '1st'
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// case 'o':
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case 111:
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resultString += String(date.getDate()) + ordinal(date.getDate());
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resultString += String(date.getUTCDate()) + ordinal(date.getUTCDate());
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break;
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// 'AM'
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// case 'p':
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case 112:
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resultString += date.getHours() < 12 ? locale.AM : locale.PM;
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resultString += date.getUTCHours() < 12 ? locale.AM : locale.PM;
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break;
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// '12:00:00 AM'
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@ -443,7 +447,7 @@
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// '4'
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// case 'u':
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case 117:
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var day = date.getDay();
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var day = date.getUTCDay();
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resultString += day === 0 ? 7 : day;
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break; // 1 - 7, Monday is first day of the week
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@ -456,7 +460,7 @@
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// '4'
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// case 'w':
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case 119:
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resultString += date.getDay();
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resultString += date.getUTCDay();
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break; // 0 - 6, Sunday is first day of the week
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// '12/31/69'
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@ -468,7 +472,7 @@
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// '70'
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// case 'y':
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case 121:
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resultString += ('' + date.getFullYear()).slice(2);
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resultString += ('' + date.getUTCFullYear()).slice(2);
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break;
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// '+0000'
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@ -591,7 +595,7 @@
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// This works by shifting the weekday back by one day if we
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// are treating Monday as the first day of the week.
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var weekday = date.getDay();
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var weekday = date.getUTCDay();
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if (firstWeekday === 'monday') {
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if (weekday === 0) // Sunday
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weekday = 6;
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@ -599,8 +603,8 @@
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weekday--;
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}
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var firstDayOfYearUtc = Date.UTC(date.getFullYear(), 0, 1),
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dateUtc = Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()),
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var firstDayOfYearUtc = Date.UTC(date.getUTCFullYear(), 0, 1),
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dateUtc = Date.UTC(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate()),
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yday = Math.floor((dateUtc - firstDayOfYearUtc) / 86400000),
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weekNum = (yday + 7 - weekday) / 7;
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