I have a datetime field in SQL Server 2008 which stores the date and time in military format (or international format if you prefer)
examples:
2011-
As you requested this in T-SQL, you might want to look at the CAST and CONVERT syntax which specifically lists various date and time formats.
For example:
select convert(varchar, getdate(), 100)
Would give you:
Feb 3 2012 3:26PM