Date Picker.

 DatePicker:

                    Date picker is a control used for selecting date,time or both.It provides a straightforward interface for managing date and time,allowing users to select quickly and efficiently. Appearance of date pickers cannot be customised.

Design and Implementation:

1.Declare an instance variable in .h file;

2.Set a frame;

3.set date picker mode to UIdatepickermodedate;

Output for the above code will be

Conclusion:
                 If you are interested,you can make an accurate countdown timer app by adding label to display the countdown and a button method that calculates the time left from the selected date.