The 4th of March is Pound Cake Day.
If the day has crept up on you caught you unawares so that you don’t have time to make one, you could always sneak out to the grocery store and buy one.
Why’s it called a pound cake, anyway? And how long has this cake been around? CooksInfo knows; see the entry on pound cake.
The earliest mention that CooksInfo finds of a March 4th Pound Cake in print archives dates from 2004 in Tennessee:
“March 4 — National Pound Cake Day.” Duggin, Nancy. March filled with reasons to celebrate. Murfreesboro, Tennessee: The Daily News-Journal. Tuesday, 2 Marcy 2004. Page D1, col. 6.