I want to modify calender in Date type field

When I select the Date field type in my doctype, a calendar view is displayed. I wish to customize this calendar view to only display Tuesdays and Fridays for a specific person’s shift. Other days should not be selectable. For instance, if a person is only available for appointments on Tuesdays, then when making an appointment, I should only be able to select Tuesdays in a given month.

Anyone who knows this, kindly share.

@abhay19 can you re explain . maybe share some screenshots ?