Using one of the latest example from MSDN library (the DateTimePicker with design support) I made some changes and added language support. Also as a functionality I made the drop down window close if the control losts focus. You will also find a link to an example.
To change the language it is enought to change the culture of the control using the property Culture and also to write the translation of "Today" for the specific language using the property TodayText. Also changed from the initial version is the first day of the week (now Monday- if I will have some time I will construct a property to specify the first day of the week).
The links are:
The control:
http://must-ht.dyndns.org/Controls/DateTimePicker%20DesignTime%20Sample.zip[/url]
The example: [url]http://must-ht.dyndns.org/Controls/DateTime%20Test.zipP.S. Before using the example copy (or install) the dll for DayTimePicker in the Visual Studio Net folder (under CompactFramework....)
Hope that will be of some use!