Datepicker custom header not working (example on stackblitz)

[SandorSzilard]

I tried to open the datepicker custom header example on stackblitz, but when I click the calendar icon, it displays a blank calendar (no dates, no header, only a white page).

I try to make a material design calendar, but Angular Material Datepicker seems a bit to limited (it looks like the AngularJS version had more features, or the older versions). How about expanding the examples page? (for example: how to add buttons on the bottom of the calendar, how to make more complex header designs, how to add a "time picker" )

[mmalerba]

I believe this was broken due to #16267 but should be fixed now

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