I am trying to apply locale on old datepicker https://valor-software.com/ngx-bootstrap/#/datepicker I have tried evrything and i dont know where to look further, i can use the new one, but i have big solution that i have to stay on old datepicker Here is what i have my.module.ts import { CommonModule } from '@angular/common'; import { DatepickerModule } from 'ngx-bootstrap/datepicker'; @NgModule({ imports: [ DatepickerModule.forRoot() ], declarations: [ ], providers: [ ], schemas: [ CUSTOM_ELEMENTS_SCHEMA ] }) export class MyModule { } my.component.ts import { defineLocale } from 'ngx-bootstrap/bs-moment'; import { de } from 'ngx-bootstrap/locale'; defineLocale('de', de); @Component({ templateUrl: './my.component.html', styleUrls: ['./my.component.scss'] }) export class MyComponent implements OnInit {} my.component.html <datepicker formControlName="effectiveDate" [showWeeks]="false" [locale]="de"> Can't bind to 'locale' since it isn't a known property of 'datepicker'. Continue reading...