Peanut Butter Cup Cheesecake Day is observed annually on February 24, primarily in the United States. This unofficial holiday celebrates the popular combination of peanut butter cups and cheesecake, a dessert that features a crust made from Oreo cookies or chocolate wafers, a cream cheese filling flavored with peanut butter, and topped with chocolate ganache and miniature peanut butter cups. The holiday was created by Patti Jewel and her team at HolidaySmart.com, joining the family of cheesecake days that began with International Cheesecake Day in 1985. Peanut butter cups, invented by Harry Burnet Reese in 1928, are among the most popular candies in the U.S. and are now produced by The Hershey Company. To celebrate, people often enjoy a peanut butter cup cheesecake from a bakery, order a slice for dessert, or make their own to share, frequently posting about it on social media with the hashtag #PeanutButterCupCheesecakeDay.