title: How to use current date time in xamarin forms date picker?
body: <p>I have a xamarin App applying for leave. The student should apply to leave within 3 days from the day they took leave. If they take leave on 03-oct-2020 then they should apply to leave on or before October 6. I am using the calendar for selecting a date and setting the maximum date as today and a minimum date as Today -3. So the last remaining days won't be available. It's working. But when the student set the device date manually to any past date. Then the calendar in the app also changed to that date. How could prevent this?</p>
  <p>Please help me on this</p>