International Pizza Cake Day is celebrated worldwide every third Thursday of April. This culinary holiday honors a unique dish known as pizza cake, which is essentially a multilayered pizza baked in a cake pan. The concept originated from the Canadian restaurant chain Boston Pizza, which introduced pizza cake as part of its "Pizza Game Changers" campaign in 2014. The dish gained popularity after a recipe was posted on the So Good Blog, and further recognition came when the Pilsbury Company shared a recipe, leading to some confusion about its origins. Celebrants can enjoy pizza cake by visiting Boston Pizza locations or making their own at home, often sharing their creations on social media with hashtags like #InternationalPizzaCakeDay. Although it has received mixed reviews for its taste and preparation difficulty, pizza cake remains a fun and customizable dish that surprises many at gatherings.