With a h pattern according to msdn
"h" - The hour, using a 12-hour clock from 1 to 12.
Why don't you juse 24h format? "H" or "HH" - The hour, using a 24-hour clock from 0 to 23.?
Hope this helps, if you have any other questions or comments, please let me know,
Telerik WinForms MVP