mat-datepicker - Displays date in ISO format.

Bug, feature request, or proposal:

Using mat-datepicker.

When creating a FormControl or setting FormControl.value that is bound to value of input the date is displayed in ISO format .

What is the expected behavior?

It should display the date in en-US locale format: mm/dd/yyyy.

What is the current behavior?

Displays ISO string format.

What are the steps to reproduce?

Providing a StackBlitz/Plunker (or similar) is the best way to get the team to see your issue.

Plunker starter (using on @master): https://goo.gl/uDmqyY

StackBlitz starter (using latest npm release): https://goo.gl/wwnhMV

http://plnkr.co/edit/qOurJCVYUZMGCjiaal4o?p=preview

What is the use-case or motivation for changing an existing behavior?

It is not behaving according to the specifications

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular 5.0.0
Material 5.0.0-rc0
TypeScript 2.6.1

Is there anything else we should know?

[donroyco]

Duplicate of #7717

OK.

Using [ngModel] instead of [value] works.

Thanks.

[mmalerba]

This has been fixed: #7831

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