AngularJs $http sends date object to server without time offset

I have an AngularJs app, one of the pages has bootstrap datetime picker tool.
and this is what the input which is using it looks like:

<input class="form-control"
   ng-click=" = !"
   ng-init=" = false"
   uib-datepicker-popup="dd/MM/yyyy" />

When I choose a date I see it correctly in the input, let's say I choosed 14/01/2017..

In vm.searchModel.fromYear it's saved as js date object, with the date value and timezone Sun Jan 14 2018 00:00:00 GMT+0300 (Turkey Standard Time).

The problem is when I send this to server it's converted by $http service and sent by ajax like: 2018-01-13T21:00:00.000Z.

As you see it's one day behind (because of converting to UTC format, but without the time offset +3 hours.

The API receives this string and bind it to a property of DateTime type but as it is, the date will be 2018-01-13, not 2018-01-14 as the user really choose it.

Any idea why is that happening ? I read some answers and didn't find an explanation or a solution.

2 answers

  • answered 2018-01-14 10:43 mkeremguc

    the ISO string that $http converts is correct. since you just need an explanation:

    time is 21:00 in a GMT zone at the time of 00:00 in a GMT+3 timezone. the ISO string represents the GMT zone time which is 3 hours behind the GMT+3 hence the date

  • answered 2018-01-14 10:43 davidkonrad

    I suggest you use momentjs and moment-timezone to solve this problem. Include the libraries, if you are using bower the recent versions is

    "momentjs": "~2.20.1",
    "moment-timezone": "0.5.14"

    Now setup your timezone (Turkey Standard Time) in app.config

    angular.module('myApp', [...] ).config(function(...) {"Europe/Istanbul"); 

    When you need to pass the date with respect of timezone

    moment(date).format() //will convert to GMT+0300

    This also works of you need to pass back a formatted date

    moment(date).format('DD/MM/YYYY') // 14/01/2018

    It goes either way. You just convert the dates / timestamps received from the server to the local timezone the same way, i.e

    var localDate = moment(date).format()

    The above using Europe/Istanbul was just an example. I dont know what different timezones your users operates in, it is up to you to set in .config() properly according to the users locale / timezone. If you not know that you can use;

    Read the documentation for how it works.

    tl;dr : Simply use along with moment().format(), by that your app can operate in different timezones using the same dates, without corrupting the dates or showing wrong dates to the end user.