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Sunday, March 17, 2013
1 hour from 6-7
march 13 is selection Sunday, where they choose the teams and then make the bracket
It is Sunday, December 4th on ESPN but not sure yet of the time as there is no info on the ESPN site as of the date of this answer.
It is March 13th 2011. The time is not currently set, but it should be sometime in the early evening on CBS.