Go get your own holiday then. EDIT: After a quick Google search I learned that there is indeed a "Cake Day" on November 26. Apparently there's also a competing "Cake Day" on October 16 in commemoration of Marie Antionette's infamous "Let them eat cake" proclamation even though it's pretty much agreed she never actually said that.
Got my Key Lime version, and used it when I shared the AFT Senoia inner-tubes ad. My daughter and son in law visited the National Museum of Mathematics, in New York City on Pi Day, 6 or 7 years ago. They celebrate it big, and the place looked very cool in the news segment my kids were shown in. https://momath.org/ (She was a math major then, and is now a Bio-statistics PhD candidate.)
Chocolate Peanut Butter Pie Is Finally On Costco's Shelves https://www.mashed.com/1226707/yes-peanut-butter-pie-is-finally-on-costcos-shelves