JavaScript - Parse UTC Date

问题:

How can I parse a simple date string and let JavaScript know that it's actually a UTC date? Currently, if I do new Date('2015-08-27') it converts it to my timezone.

回答1:

You can do append 'T00:00:00.000Z' to make the time zone specific (Z indicates UTC)

new Date('2015-08-27' + 'T00:00:00.000Z') 

Note that new Date('2015-08-27') is treated differently in ES5 (UTC) vs. ES6 (Local), so you can't expect it any correction to be work consistently if you were planning to to hard code it (i.e. don't do it)

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Also, do note that your console.log might show you the local time corresponding to the UTC time the expression evaluates to (that tends to throw you off a bit if you are expecting UTC to be at the end for expression that evaluate to UTC times and your local time zone at the end for those that evaluate to your local time). For instance

new Date('2015-08-27T00:00:00.000Z') 

could show

Thu Aug 27 2015 1:00:00 GMT+100 

which is the same as

Thu Aug 27 2015 00:00:00 UTC 

回答2:

Here is what I would do.

var current = new Date(); var utcDate = new Date(current.getTime() + current.getTimezoneOffset() * 60000); 

文章来源: JavaScript - Parse UTC Date