I got my Michigan acceptance letter on January 30th, which was shocking since they told us not to expect anything until March. As others have already mentioned I'm pretty sure they continued sending out acceptances into February. I don't remember exactly when I got my supplemental, but I remember for sure that it was due on December 22nd - so I probably got it sometime the week before that (right in the middle of finals and right before my Ohio State interview - fun times!). I remember some other SDN applicants getting their supplementals WAY before I did (like early november-ish) so with no word from them by Thanksgiving I had totally written Michigan off. They were definitely full of surprises, haha (umm including OOS tuition price tag which I had foolishly neglected to look at until after I was accepted - I know all schools are expensive for OOS but holy smokes).