moment.tz 给出的结果不正确 [英] moment.tz is giving incorrect result

问题描述

我试图根据所选时区转换日期.我很惊讶地看到时差为 5 分钟的日期的结果相同.例如，

I was trying to convert dates according to selected timezone. I was surprised to see same result for dates with 5 mins of time difference. For ex,

var x = "2017-07-10T18:30:00.000Z"
var y = "2017-07-10T18:35:00.000Z"
var z = "2017-07-10T18:45:00.000Z"

并尝试将它们转换为使用 moment.tz:

and tried converting them to using moment.tz:

moment.tz(x, 'America/New_York').format('DD/MM/YYYY HH:MM:SS');
moment.tz(y, 'America/New_York').format('DD/MM/YYYY HH:MM:SS')
moment.tz(z, 'America/New_York').format('DD/MM/YYYY HH:MM:SS')

令我惊讶的是，"10/07/2017 14:07:00" 的所有 3 个结果都相同.怎么了?任何帮助将不胜感激.

To my surprise, result was same for all 3 being "10/07/2017 14:07:00". What's going wrong? Any help will be appreciated.

推荐答案

简答:

问题是您使用大写 MM(月份)而不是小写 mm 分钟 format().请注意，SS(小数秒)和 ss(秒)有同样的问题.

The issue is that you are using uppercase MM (month) instead of lowercase mm minutes in you format(). Note that, you have the same problem for SS (fractional seconds) and ss (seconds).

关于您的代码示例的一般说明:

使用 moment.tz 用于使用给定时区解析时间字符串(例如 'America/New_York')，moment.tz 不适用于将输入转换为给定时区.

Use moment.tz for parsing time string using a given timezone (e.g. 'America/New_York'), moment.tz is not made for converting input to given timezone.

你必须使用 tz() 方法将时刻对象转换为给定时区.

You have to use tz() method to convert a moment object to a given timezone.

请注意，您的输入字符串以 Z 结尾，因此它表示 UTC 时间.

Note that your input string ends with Z so it represents time in UTC.

正如马特约翰逊在评论中指出的那样，在您的情况下，即使是 moment.tz(input, zone) 也会将输入转换为给定区域，因为输入字符串包含 Z (保留 UTC 时区).无论如何，不​​鼓励这种方法.

As Matt Johnson pointed out in comments, in your case even moment.tz(input, zone) would convert input to given zone because input string contains the Z (that stays for UTC timezone). Anyway this kind of approach is discouraged.

这里的代码示例 解析 UTC 时间字符串并将其转换为 'America/New_York' 时区:

Here a code sample that parses UTC time string and converts it to 'America/New_York' timezone:

var x = "2017-07-10T18:30:00.000Z";
var y = "2017-07-10T18:35:00.000Z";
var z = "2017-07-10T18:45:00.000Z";

console.log( moment.utc(x).tz('America/New_York').format('DD/MM/YYYY HH:MM:SS') );
console.log( moment.utc(y).tz( 'America/New_York').format('DD/MM/YYYY HH:mm:ss') );
console.log( moment.utc(z).tz( 'America/New_York').format('DD/MM/YYYY HH:mm:ss') );

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment-timezone/0.5.13/moment-timezone-with-data-2012-2022.min.js"></script>

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