Format a datetime value in a datasource

Hey, im trying to format my timestamp in my datasource to be  a 'short date time string' etc. like this :
From this : 7/15/2009 11:50:03 AM to  7/15/2009 
From this :  7/25/2009 11:50:03 AM to  Saturday, July 25, 2009
From this : July 25, 2009 to 7/25/2009
etc. is this possible in a datasource? Thanks Si 
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