How to set Date Format in ASP.Net AJAX CalendarExtender Control

Sir,

I want to change the formate of ajaxcalender extender like 23-Apr-2013 how it possible.

I want this because i have some rocrds in table where date is stored in formate of 23-Apr-13 and when i wnat to search it on basis of date i am unable to find it because may calender formate is 23-04-13. if their is no way to cahge the formate calaender extender so i convert 23-04-13 values to 23-Apr-13 using code ?