MCAT test day was my birthday when I took it. As we stood in line waiting to get into the room, a couple friends who were in the same room with me started singing happy birthday. The proctors told me happy birthday on the way in. At the break, another friend had brought me a birthday present, and I got a card from someone else. A few people I didn't even know that were in the room wished me a happy birthday during the break. It was a pretty cool day! I had considered taking it on Sunday, so that I could have fun during those 8 hours instead, but decided that the anticipation of taking the test the next day woudl be much worse. As it gets closer to the test, you start to just want to get it over with. My advice: Take it on Saturday and get it over with!!