If you are tired of getting dates in your repeater control as shown in the following figure 
and you want to get dates in some custom format then simply you can use the ToString() method with some parameters to convert it into desired format as shown below. 
You just have to enter this small piece of code to achieve this 
For further information on DateTime formats please visit this link http://msdn.microsoft.com/en-us/library/az4se3k1.aspx