[GaryVoshol]

Last year Week 4 was Easter; there was no bye week. (Of course, most regionals don't have Sunday events.) There was a week between the last regional and the Championship.

Championship is April 16-18, 2009.

Ship is Feb 17.

That means:
Week 1 - Feb 26-28
Week 2 - Mar 5-7
Week 3 - Mar 12-14
Week 4 - Mar 19-21
Week 5 - Mar 26-28
Week 6 - Apr 2-4.

Week 6 regionals (including the Michigan State Championship) wouldn't know who qualified on Apr 3, the Week 1-5 payment deadline. Thus the 4 extra days.