Problems
Use the following problems to test your skills at working with dates, times, time zones, and date and time localization. Give each problem a try before you turn to the solutions and download the example programs.
41. Days of the week
Write a program that lets the user pick a birthdate from a MonthCalendar control. When the user clicks a button, display the days of the week for the next 10 birthdays after today's date.
42. Date and time picker
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...
