VS 2010 datetimepicker and monthcalendar accepting MM/dd/yyyy

I have a program (for friends and family) where the date is validated using MM/dd/yyyy.

I recently found out that it bombs if you're not set in US format, for example Canada system settings for datetimepicker and monthcalendar expect dd/MM/yyyy

Is there an easy way to have the datetimepicker and monthcalender accept another date format.

or format the MM/dd/yyyy to the systems expected format.

I've tried so many things that i must have missed the simple way.