Hi Krittikorn,
Sorry for the inconvenience caused.
We regret to let you that at present there is no support for "Buddhist
calendar" in our Datepicker control. Currently, we are using Gregorian
calendar as base calendar for all type of cultures and retrieving the
'DateTimeFormat' based on this calendar type. We have already added it to our
feature request list.
We will let you know once this feature has been implemented.
Please let us know if you need any further assistance.
Regards,
Sasikala Nagarajan