If you’d be so kind to oblige me and roll the clock back to grade school, we’re breaking for a moment from today’s serious science coverage to bring you this important announcement: Pi Day is back. Yes, after 364 long days, 3/14 has finally rolled around again and with it, a moment to appreciate the festivities associated with our favorite mathematical constant, pi. Last year, we brought you ThinkGeek’s Pi-tini recipe, among other things and this year fortune has smiled on us again: the ThinkGeek Pizza Pi Cutter is now on sale for a hot $12.99! (We won’t talk about how the Pi By Numbers Blanket is out of stock.) Baking pies is obviously a staple activity on Pi Day and our friends at NPR are celebrating with this delicious recipe roundup for the occasion, which includes Sweet Potato Pie, Pizza Pie, Granola Cranberry Walnut Pie, and the aptly-titled Pimp My Mince Pie. How are you observing Pi Day? Check out PiDay.org for ideas. –Sarah C.

Photo: Claire O’Neill for NPR