Angular 4 date pipe displays wrong date because of time zones - how to fix this?

for angular 5 and up , you can try to add timezone in pipe,

By default it takes the local timezone of user machine

and you can specify it in minutes for example for GMT-2, timezone: '-120'

{{ competition.compStart | date: 'short' : '-120'}}

Behind the scenes, DatePipe uses locale to display date in user's timezone. Try with client's timezone data:

1931-05-31T00:00:00.000-0300 instead of 1931-05-31T00:00:00.000+0000.

You can get client's offset in minutes using (new Date()).getTimezoneOffset()

This is actually the known issue/limitation of DatePipe. Community is aware of it. It the future, you will be able to specify timezone as one of parameters ({{ value | date:format:zone }}).

Here is the issue on github: https://github.com/angular/angular/issues/9324

For more advanced date manipulations, I recommend moment.js (less headaches, better consistency, less testing, simpler maintaining).

EDIT: It has been added:

date_expression | date[:format[:timezone[:locale]]]

Code: https://github.com/angular/angular/blob/5.0.4/packages/common/src/pipes/date_pipe.ts#L137 Docs: https://angular.io/api/common/DatePipe

In html file, the below:

{{ value | date:'yyyy-MM-dd hh:mm:ss a':'UTC'+ offset}}

In ts file add the following,

offset:number;
this.offset = (new Date().getTimezoneOffset());

can be useful for converting UTC time to system time (local)