Matt has his colonoscopy scheduled for the November 26th, the day after Thanksgiving.  If he hadn't done it that day he would've had to wait until January and since this was the last requirement he needed to complete before beginning to accrue time on the deceased donor list, it was better to do sooner than later.  If you're not familiar with the prep before a colonoscopy, you can't eat anything the entire day before and have to drink about a gallon of a not-so-pleasant liquid that flushes everything out of your system.  You spend a lot of time in the bathroom that day.  Since, Matt couldn't eat anything on Thanksgiving day, the family celebrated the following day after his appointment because by then he was really ready to eat

One of Matt's aunts finds out she is a compatible blood match, but there are a few other blood tests they have to undergo.  The process moves very slowly and she is not contacted again to complete these blood tests until January.  At this point, Matt's family realizes that they need to play a more active role in advocating to help find him a donor. There are too many details that need to be followed up on to risk having his file get buried at the bottom of the pile.