an anniversary of the opening of a school

Yesterday was an anniversary of the opening of my school. Actually the real day was 5th, but because of 3 grade’s final exam, our school’s principal postponed this day. I was pretty surprised about it. And today was a saturday which I don’t have to go to school…. Therefore today, when I opened my eyes, I thought today was a vacation.. Because I don’t have to go to school 3 days!!!But I have to study, so I went to my father’s school, and just studied!!!!