Pi day, a day for celebrating Pi, the useful number that we can see everywhere, in science, in math, or even in your daily life. For commemorate this special number, people set 14th March as Pi day, people eat pie in this day and having party, the school also set a Pi day party for students. We bring the pie that we want to share with others to school and eat it during the party. But this year there are pizza all over the table, I think it was because Pizza company was having a buy one get one free discount, and I feel upset that there was no apple pie, which is my favorite. However the activity was still great, and my stomach was full of pizza!