我有一个网页，有三个下拉菜单，分别是日、月和年。如果我使用JavaScript Date构造函数接受数字，那么我得到一个Date对象为我的当前时区:
new Date(xiYear, xiMonth, xiDate)
给出正确的日期，但由于夏令时，它认为日期是GMT+01:00。
这里的问题是，然后我将这个日期传递给一个Ajax方法，当日期在服务器上被反序列化时，它已经转换为GMT，因此失去了一个小时，这将一天往回移动了一个小时。 现在我可以将日、月和年分别传递到Ajax方法中，但似乎应该有更好的方法。
接受的答案为我指明了正确的方向，但是仅仅使用setUTCHours()本身就改变了:
Apr 5th 00:00 GMT+01:00
to
Apr 4th 23:00 GMT+01:00
然后，我还必须设置UTC日期、月份和年份
Apr 5th 01:00 GMT+01:00
这正是我想要的
当前回答
这可能会帮助一些人，把UTC放在你传递给新构造函数的东西的末尾
至少在chrome中，你可以说var date = new date ("2014-01-01 11:00:00 UTC")
其他回答
这适用于不同时区(IST, PST，墨西哥，中美洲):
let dateUtc: any = new Date(Date.parse(data.details.dateOfBirth));
dateUtc = new Date(dateUtc.getTime() + Math.abs(dateUtc.getTimezoneOffset()*60000));
console.log(dateUtc);
我所看到的最佳解决方案来自
http://www.codingforums.com/archive/index.php/t-19663.html
打印时间命令功能
<script language="javascript" type="text/javascript">
//borrowed from echoecho
//http://www.echoecho.com/ubb/viewthread.php?tid=2362&pid=10482&#pid10482
workDate = new Date()
UTCDate = new Date()
UTCDate.setTime(workDate.getTime()+workDate.getTimezoneOffset()*60000)
function printTime(offset) {
offset++;
tempDate = new Date()
tempDate.setTime(UTCDate.getTime()+3600000*(offset))
timeValue = ((tempDate.getHours()<10) ? ("0"+tempDate.getHours()) : (""+tempDate.getHours()))
timeValue += ((tempDate.getMinutes()<10) ? ("0"+tempDate.getMinutes()) : tempDate.getMinutes())
timeValue += " hrs."
return timeValue
}
var now = new Date()
var seed = now.getTime() % 0xfffffff
var same = rand(12)
</script>
Banff, Canada:
<script language="JavaScript">document.write(printTime("-7"))</script>
完整代码示例
<html>
<head>
<script language="javascript" type="text/javascript">
//borrowed from echoecho
//http://www.echoecho.com/ubb/viewthread.php?tid=2362&pid=10482&#pid10482
workDate = new Date()
UTCDate = new Date()
UTCDate.setTime(workDate.getTime()+workDate.getTimezoneOffset()*60000)
function printTime(offset) {
offset++;
tempDate = new Date()
tempDate.setTime(UTCDate.getTime()+3600000*(offset))
timeValue = ((tempDate.getHours()<10) ? ("0"+tempDate.getHours()) : (""+tempDate.getHours()))
timeValue += ((tempDate.getMinutes()<10) ? ("0"+tempDate.getMinutes()) : tempDate.getMinutes())
timeValue += " hrs."
return timeValue
}
var now = new Date()
var seed = now.getTime() % 0xfffffff
var same = rand(12)
</script>
</head>
<body>
Banff, Canada:
<script language="JavaScript">document.write(printTime("-7"))</script>
<br>
Michigan:
<script language="JavaScript">document.write(printTime("-5"))</script>
<br>
Greenwich, England(UTC):
<script language="JavaScript">document.write(printTime("-0"))</script>
<br>
Tokyo, Japan:
<script language="JavaScript">document.write(printTime("+9"))</script>
<br>
Berlin, Germany:
<script language="JavaScript">document.write(printTime("+1"))</script>
</body>
</html>
简单地设置时区和返回根据
new Date().toLocaleString("en-US", {timeZone: "America/New_York"})
其他时区如下
var world_timezones =
[
'Europe/Andorra',
'Asia/Dubai',
'Asia/Kabul',
'Europe/Tirane',
'Asia/Yerevan',
'Antarctica/Casey',
'Antarctica/Davis',
'Antarctica/DumontDUrville',
'Antarctica/Mawson',
'Antarctica/Palmer',
'Antarctica/Rothera',
'Antarctica/Syowa',
'Antarctica/Troll',
'Antarctica/Vostok',
'America/Argentina/Buenos_Aires',
'America/Argentina/Cordoba',
'America/Argentina/Salta',
'America/Argentina/Jujuy',
'America/Argentina/Tucuman',
'America/Argentina/Catamarca',
'America/Argentina/La_Rioja',
'America/Argentina/San_Juan',
'America/Argentina/Mendoza',
'America/Argentina/San_Luis',
'America/Argentina/Rio_Gallegos',
'America/Argentina/Ushuaia',
'Pacific/Pago_Pago',
'Europe/Vienna',
'Australia/Lord_Howe',
'Antarctica/Macquarie',
'Australia/Hobart',
'Australia/Currie',
'Australia/Melbourne',
'Australia/Sydney',
'Australia/Broken_Hill',
'Australia/Brisbane',
'Australia/Lindeman',
'Australia/Adelaide',
'Australia/Darwin',
'Australia/Perth',
'Australia/Eucla',
'Asia/Baku',
'America/Barbados',
'Asia/Dhaka',
'Europe/Brussels',
'Europe/Sofia',
'Atlantic/Bermuda',
'Asia/Brunei',
'America/La_Paz',
'America/Noronha',
'America/Belem',
'America/Fortaleza',
'America/Recife',
'America/Araguaina',
'America/Maceio',
'America/Bahia',
'America/Sao_Paulo',
'America/Campo_Grande',
'America/Cuiaba',
'America/Santarem',
'America/Porto_Velho',
'America/Boa_Vista',
'America/Manaus',
'America/Eirunepe',
'America/Rio_Branco',
'America/Nassau',
'Asia/Thimphu',
'Europe/Minsk',
'America/Belize',
'America/St_Johns',
'America/Halifax',
'America/Glace_Bay',
'America/Moncton',
'America/Goose_Bay',
'America/Blanc-Sablon',
'America/Toronto',
'America/Nipigon',
'America/Thunder_Bay',
'America/Iqaluit',
'America/Pangnirtung',
'America/Atikokan',
'America/Winnipeg',
'America/Rainy_River',
'America/Resolute',
'America/Rankin_Inlet',
'America/Regina',
'America/Swift_Current',
'America/Edmonton',
'America/Cambridge_Bay',
'America/Yellowknife',
'America/Inuvik',
'America/Creston',
'America/Dawson_Creek',
'America/Fort_Nelson',
'America/Vancouver',
'America/Whitehorse',
'America/Dawson',
'Indian/Cocos',
'Europe/Zurich',
'Africa/Abidjan',
'Pacific/Rarotonga',
'America/Santiago',
'America/Punta_Arenas',
'Pacific/Easter',
'Asia/Shanghai',
'Asia/Urumqi',
'America/Bogota',
'America/Costa_Rica',
'America/Havana',
'Atlantic/Cape_Verde',
'America/Curacao',
'Indian/Christmas',
'Asia/Nicosia',
'Asia/Famagusta',
'Europe/Prague',
'Europe/Berlin',
'Europe/Copenhagen',
'America/Santo_Domingo',
'Africa/Algiers',
'America/Guayaquil',
'Pacific/Galapagos',
'Europe/Tallinn',
'Africa/Cairo',
'Africa/El_Aaiun',
'Europe/Madrid',
'Africa/Ceuta',
'Atlantic/Canary',
'Europe/Helsinki',
'Pacific/Fiji',
'Atlantic/Stanley',
'Pacific/Chuuk',
'Pacific/Pohnpei',
'Pacific/Kosrae',
'Atlantic/Faroe',
'Europe/Paris',
'Europe/London',
'Asia/Tbilisi',
'America/Cayenne',
'Africa/Accra',
'Europe/Gibraltar',
'America/Godthab',
'America/Danmarkshavn',
'America/Scoresbysund',
'America/Thule',
'Europe/Athens',
'Atlantic/South_Georgia',
'America/Guatemala',
'Pacific/Guam',
'Africa/Bissau',
'America/Guyana',
'Asia/Hong_Kong',
'America/Tegucigalpa',
'America/Port-au-Prince',
'Europe/Budapest',
'Asia/Jakarta',
'Asia/Pontianak',
'Asia/Makassar',
'Asia/Jayapura',
'Europe/Dublin',
'Asia/Jerusalem',
'Asia/Kolkata',
'Indian/Chagos',
'Asia/Baghdad',
'Asia/Tehran',
'Atlantic/Reykjavik',
'Europe/Rome',
'America/Jamaica',
'Asia/Amman',
'Asia/Tokyo',
'Africa/Nairobi',
'Asia/Bishkek',
'Pacific/Tarawa',
'Pacific/Enderbury',
'Pacific/Kiritimati',
'Asia/Pyongyang',
'Asia/Seoul',
'Asia/Almaty',
'Asia/Qyzylorda',
'Asia/Qostanay',
'Asia/Aqtobe',
'Asia/Aqtau',
'Asia/Atyrau',
'Asia/Oral',
'Asia/Beirut',
'Asia/Colombo',
'Africa/Monrovia',
'Europe/Vilnius',
'Europe/Luxembourg',
'Europe/Riga',
'Africa/Tripoli',
'Africa/Casablanca',
'Europe/Monaco',
'Europe/Chisinau',
'Pacific/Majuro',
'Pacific/Kwajalein',
'Asia/Yangon',
'Asia/Ulaanbaatar',
'Asia/Hovd',
'Asia/Choibalsan',
'Asia/Macau',
'America/Martinique',
'Europe/Malta',
'Indian/Mauritius',
'Indian/Maldives',
'America/Mexico_City',
'America/Cancun',
'America/Merida',
'America/Monterrey',
'America/Matamoros',
'America/Mazatlan',
'America/Chihuahua',
'America/Ojinaga',
'America/Hermosillo',
'America/Tijuana',
'America/Bahia_Banderas',
'Asia/Kuala_Lumpur',
'Asia/Kuching',
'Africa/Maputo',
'Africa/Windhoek',
'Pacific/Noumea',
'Pacific/Norfolk',
'Africa/Lagos',
'America/Managua',
'Europe/Amsterdam',
'Europe/Oslo',
'Asia/Kathmandu',
'Pacific/Nauru',
'Pacific/Niue',
'Pacific/Auckland',
'Pacific/Chatham',
'America/Panama',
'America/Lima',
'Pacific/Tahiti',
'Pacific/Marquesas',
'Pacific/Gambier',
'Pacific/Port_Moresby',
'Pacific/Bougainville',
'Asia/Manila',
'Asia/Karachi',
'Europe/Warsaw',
'America/Miquelon',
'Pacific/Pitcairn',
'America/Puerto_Rico',
'Asia/Gaza',
'Asia/Hebron',
'Europe/Lisbon',
'Atlantic/Madeira',
'Atlantic/Azores',
'Pacific/Palau',
'America/Asuncion',
'Asia/Qatar',
'Indian/Reunion',
'Europe/Bucharest',
'Europe/Belgrade',
'Europe/Kaliningrad',
'Europe/Moscow',
'Europe/Simferopol',
'Europe/Kirov',
'Europe/Astrakhan',
'Europe/Volgograd',
'Europe/Saratov',
'Europe/Ulyanovsk',
'Europe/Samara',
'Asia/Yekaterinburg',
'Asia/Omsk',
'Asia/Novosibirsk',
'Asia/Barnaul',
'Asia/Tomsk',
'Asia/Novokuznetsk',
'Asia/Krasnoyarsk',
'Asia/Irkutsk',
'Asia/Chita',
'Asia/Yakutsk',
'Asia/Khandyga',
'Asia/Vladivostok',
'Asia/Ust-Nera',
'Asia/Magadan',
'Asia/Sakhalin',
'Asia/Srednekolymsk',
'Asia/Kamchatka',
'Asia/Anadyr',
'Asia/Riyadh',
'Pacific/Guadalcanal',
'Indian/Mahe',
'Africa/Khartoum',
'Europe/Stockholm',
'Asia/Singapore',
'America/Paramaribo',
'Africa/Juba',
'Africa/Sao_Tome',
'America/El_Salvador',
'Asia/Damascus',
'America/Grand_Turk',
'Africa/Ndjamena',
'Indian/Kerguelen',
'Asia/Bangkok',
'Asia/Dushanbe',
'Pacific/Fakaofo',
'Asia/Dili',
'Asia/Ashgabat',
'Africa/Tunis',
'Pacific/Tongatapu',
'Europe/Istanbul',
'America/Port_of_Spain',
'Pacific/Funafuti',
'Asia/Taipei',
'Europe/Kiev',
'Europe/Uzhgorod',
'Europe/Zaporozhye',
'Pacific/Wake',
'America/New_York',
'America/Detroit',
'America/Kentucky/Louisville',
'America/Kentucky/Monticello',
'America/Indiana/Indianapolis',
'America/Indiana/Vincennes',
'America/Indiana/Winamac',
'America/Indiana/Marengo',
'America/Indiana/Petersburg',
'America/Indiana/Vevay',
'America/Chicago',
'America/Indiana/Tell_City',
'America/Indiana/Knox',
'America/Menominee',
'America/North_Dakota/Center',
'America/North_Dakota/New_Salem',
'America/North_Dakota/Beulah',
'America/Denver',
'America/Boise',
'America/Phoenix',
'America/Los_Angeles',
'America/Anchorage',
'America/Juneau',
'America/Sitka',
'America/Metlakatla',
'America/Yakutat',
'America/Nome',
'America/Adak',
'Pacific/Honolulu',
'America/Montevideo',
'Asia/Samarkand',
'Asia/Tashkent',
'America/Caracas',
'Asia/Ho_Chi_Minh',
'Pacific/Efate',
'Pacific/Wallis',
'Pacific/Apia',
'Africa/Johannesburg'
];
我在使用日期选择器时也遇到过类似的问题。我的研究导致了一个非常简单的解决方案，没有任何额外的库或硬编码的乘数。
关键信息:
ISO是Javascript首选的日期标准。假设日期实用程序可能会以这种格式返回日期值。 我的日期选择器以本地化格式显示日期:mm/dd/yyyy 但是，它以ISO格式返回日期值:yyyy-mm-dd //在Date Picker date_input中选择“08/12/2020” Var input = $('#date_input').val();/ /输入:2020-08-12
Date.getTimezoneOffset()返回以分钟为单位的偏移量。
例子:
如果使用默认返回日期值而不修改字符串格式，则日期可能无法设置为您的时区。这可能会导致意想不到的结果。
var input = $('#date_input').val(); //input: 2020-08-12
var date = new Date(input); //This get interpreted as an ISO date, already in UTC
//date: Tue Aug 11 2020 20:00:00 GMT-0400 (Eastern Daylight Time)
//date.toUTCString(): Wed, 12 Aug 2020 00:00:00 GMT
//date.toLocaleDateString('en-US'): 8/11/2020
使用与ISO标准yyyy-mm-dd不同的日期字符串格式将您的时区应用于日期。
var date = new Date("08/12/2020"); //This gets interpreted as local timezone
//date: Wed Aug 12 2020 00:00:00 GMT-0400 (Eastern Daylight Time)
//date.toUTCString(): Wed, 12 Aug 2020 04:00:00 GMT
//date.toLocaleDateString('en-US'): 8/12/2020
解决方案:
要将您的时区应用到格式无关的日期，而不做字符串操作，使用Date. gettimezoneoffset()与分钟。这适用于原始日期字符串格式(即UTC日期或本地化日期)。它提供了一个一致的结果，然后可以准确地转换为UTC，用于存储或与其他代码交互。
var input = $('#date_input').val();
var date = new Date(input);
date.setMinutes(date.getMinutes() + date.getTimezoneOffset());
//date: Wed Aug 12 2020 00:00:00 GMT-0400 (Eastern Daylight Time)
//date.toUTCString(): Wed, 12 Aug 2020 04:00:00 GMT
//date.toLocaleDateString('en-US'): 8/12/2020
如果你想处理略有不同，但相关的问题，创建一个Javascript日期对象从年，月，日，…，包括时区-也就是说，如果你想把一个字符串解析成一个日期-那么你显然必须做一个令人恼火的复杂舞蹈:
// parseISO8601String : string -> Date
// Parse an ISO-8601 date, including possible timezone,
// into a Javascript Date object.
//
// Test strings: parseISO8601String(x).toISOString()
// "2013-01-31T12:34" -> "2013-01-31T12:34:00.000Z"
// "2013-01-31T12:34:56" -> "2013-01-31T12:34:56.000Z"
// "2013-01-31T12:34:56.78" -> "2013-01-31T12:34:56.780Z"
// "2013-01-31T12:34:56.78+0100" -> "2013-01-31T11:34:56.780Z"
// "2013-01-31T12:34:56.78+0530" -> "2013-01-31T07:04:56.780Z"
// "2013-01-31T12:34:56.78-0330" -> "2013-01-31T16:04:56.780Z"
// "2013-01-31T12:34:56-0330" -> "2013-01-31T16:04:56.000Z"
// "2013-01-31T12:34:56Z" -> "2013-01-31T12:34:56.000Z"
function parseISO8601String(dateString) {
var timebits = /^([0-9]{4})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2})(?::([0-9]*)(\.[0-9]*)?)?(?:([+-])([0-9]{2})([0-9]{2}))?/;
var m = timebits.exec(dateString);
var resultDate;
if (m) {
var utcdate = Date.UTC(parseInt(m[1]),
parseInt(m[2])-1, // months are zero-offset (!)
parseInt(m[3]),
parseInt(m[4]), parseInt(m[5]), // hh:mm
(m[6] && parseInt(m[6]) || 0), // optional seconds
(m[7] && parseFloat(m[7])*1000) || 0); // optional fraction
// utcdate is milliseconds since the epoch
if (m[9] && m[10]) {
var offsetMinutes = parseInt(m[9]) * 60 + parseInt(m[10]);
utcdate += (m[8] === '+' ? -1 : +1) * offsetMinutes * 60000;
}
resultDate = new Date(utcdate);
} else {
resultDate = null;
}
return resultDate;
}
也就是说，您使用不带时区的日期创建一个“UTC时间”(这样您就知道它在什么地区，即UTC 'locale'，并且它不是默认的本地)，然后手动应用指定的时区偏移量。
如果有人真的考虑Javascript date对象超过，哦，5分钟....，那不是很好吗
