CodeProject is your friend; hopefully you can learn from this example of creating a Persian-language DateTimePicker: [
^].
You need to keep in mind that: "The DateTimePicker and MonthCalendar control do not reflect the CurrentUICulture property of an application's main execution thread when you created a localized application in the .NET Framework, in Visual Studio 2005, or in Visual Studio .NET" [
^].
So, if you want to adapt the DateTimePicker to your language, you must learn how to set the current user-locale of the Application. Again, CodeProject can probably help you: "Culture Aware Month Calendar and DatePicker" [
^].