If you’re a math person or math teacher, “My Pi Day” is a must! It’s an educational math tool that can help you explore the famous number Pi and its mysteries.

On mypiday.com, you can enter your birthday and have it generate a piece of Pi that corresponds to it. Then with excitement (and maybe just slight confusion), you can find out what number in pi your date falls on and share it with your friends. Plus, you can join the global celebration of one of math’s most beloved numbers – Pi Day!