Normally, the DateTimePicker control lets the user display a date or a time, but not both. If you want to let the user select both a date and time in a single control, you need to set its Format and CustomFormat properties.

Write a program that lets the user select a date and time from a DateTimePicker control with a long date format and a short time format. These formats differ depending on the computer's locale. On my system, localized for the United States, the result would have the format Wednesday, April 1, 2020 4:13 PM.

When the user changes the selection, use a label to display the selected date and time, both in long formats. On my system, the result looks like Wednesday, April 1, 2020 4:13:24 PM. Make sure that all of the values are entered and displayed correctly for the computer's locale.