Same here! It was great having it the last day of term, convenient for the after party and all!! Some schools had it on a Thursday! Can't imagine too many people rocked up the next day.
Mine was on a Thursday too, but we got the next day off. That being said, a lot of people couldn't come with a partner because others had to go to their school the next day, so that sucked a bit.
My formal was last Saturday, and I can say truthfully that it was the best night that I had ever had.
I had a great time too. Leading up the event, I was a bit upset that I couldn't find anyone to go with me (for the reason stated above) and when I was getting ready after school I was a bit anxious and upset. Once I got to my friend's place though, all those feelings dissipated and I really had fun.
To anyone feeling a bit unsure about attending a formal on your own: it can actually work out better, particularly if you're inclined to ask people that you don't really know that well. This was the case with a lot of people at my formal, and it just made the night awkward and not as fun for them.