moment.js返回不同的时区

Question

I'm using this code to create 2 dates that represent a filter date range (in this case the last 3 months):

$ctrl.startDate = moment().utc().startOf('month').add(-2, 'months').toDate();
$ctrl.endDate = moment().utc().endOf('month').add(0, 'months').toDate();

However the first returned date is timezone CET (GMT+1) (which is my zone) and the second is CEST (GMT+2). I have no idea why! I have tried using utc() to get "neutral" dates without success.

Returned dates:

01.01.2017 01:00:00 CET

01.04.2017 01:59:59 CEST

I want either GMT or CET but the same zone! Where does moment take these 2 zones from?

I've come so far that I think it is a bug.

I use version 2.17.1

Any ideas?

JSFIDDLE: https://jsfiddle.net/FLhpq/8807/

Answer 1

I don't know if you can consider it a bug, in your fiddle you are showing in the result of toDate() that as docs says:

get the native Date object that Moment.js wraps

If you look at momentjs the code you will see that toDate() implementation:

function toDate () {
    return new Date(this.valueOf());
}

simply uses new Date() that returns a JavaScript date object in local time, see MDN Date :

Note: Where Date is called as a constructor with more than one argument, the specifed arguments represent local time. If UTC is desired, use new Date( Date.UTC(...) ) with the same arguments.

If you use format() in your code you will always see +00:00 offset.

 var divUtc = $('#divUTC'); var divLocal = $('#divLocal'); var startDate = moment.utc().startOf('month').add(-2, 'months').format('YYYY-MM-DDTHH:mm:ssZ'); var endDate = moment.utc().endOf('month').add(0, 'months').format('YYYY-MM-DDTHH:mm:ssZ'); //put UTC time into divUTC divUtc.text(startDate); divLocal.text(endDate); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.15.2/moment.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/moment-timezone/0.5.7/moment-timezone-with-data-2010-2020.min.js"></script> UTC<br/> <div id="divUTC"></div><br/> Your Local Time with respect to above UTC time<br/> <div id="divLocal"> </div>