From a Martha Stewart blueberry pie to a luscious pumpkin and cheesecake affair, these pies will add a sweet touch to any Pi Day celebration. (Or any other occasion, for that matter.)

This year, though, it comes with some twists that won’t be seen again for a century. Pi Day, celebrated on March 14 (3/14), honors the number π (approximately 3.14), which represents the ratio of a circle’s circumference to its diameter.