Please see the Localization topic for how-to localize Ignite UI for Angular components.

registerLocaleDate that you used is an Angular thing, and is used only by the Angular framework itself internally., it does not affect Ignite UI components on the page. Though, once you have registered it, you should be able to format the date in de locale using the DatePipe:

<igx-column field="OrderDate" header="Order Date" [dataType]="'date'">
    <ng-template igxCell let-cell="cell" let-val let-row>
        {{val | date}}
    </ng-template>
</igx-column>

Please let me know if you gave further questions.

Hristo

Hi, 

i have found a Solution ;)

Thank you

ingo

Here a Stackblitz Project to show my Problem

https://stackblitz.com/edit/angular-tf5vie

For changes see grid-filtering-sample.component.ts

I Have set the grid.locale = "de" and if i select a Date from the DatePicker in the Filter settings the Date is not shown  and the grid is stops working.

Thank you

ingo