Sosa Day Share definition Flag It’s time to celebrate a real nigga birthday. Sosa is an amazing, smart, sexy, well put together man who loves Casamigos and Venti Henny. “You don’t know what day it is ? It’s April 6 Sosa Day!!! ““Oh really? He’s a real one” Sosa Day by Therealkingsosa April 5, 2022 Get the Sosa Day mug.