MatDatepickerFilter - Filter function can't access class variable

I had the same issue, seems like material date picker doesn't have access to "this" of the component for filter function. For me changing:

[matDatepickerFilter]="myFilterFunction" 

to

[matDatepickerFilter]="myFilterFunction.bind(this)"

did the trick.

This is working, here is plunkr link: https://plnkr.co/edit/oRGfxLSrn6GdfRhYO1rr?p=preview

export class DatepickerOverviewExample {
  someDateToBlock: number = 3;
  myFilter = (d: Date): boolean => {
    const day = d.getDay();
    // THIS FUNCTION CANNOT ACCESS THE VARIABLE 'someDateToBlock'
    return this.someDateToBlock;
  }
}

I checked with alert(this.someDateToBlock) also