Can’t bind to ‘matDatepicker’ since it isn’t a known property of ‘input’ – Angular

While using mat-datepicker, you have to import MatDatepickerModule as well, also MatNativeDateModule is recommended to be imported too. see docs here.

import { MaterialModule, MatDatepickerModule, MatNativeDateModule } from '@angular/material';
@NgModule({
  imports: [
    ...
    MaterialModule,            // <----- this module will be deprecated in the future version.
    MatDatepickerModule,        // <----- import(must)
    MatNativeDateModule,        // <----- import for date formating(optional)
    MatMomentDateModule         // <----- import for date formating adapted to more locales(optional)
  ]

For optional module of date formating, see Module for DateAdapter from material team.

Mention: please avoid using MaterialModule for it’ll be deprecated in the future.