Every May 5, people of all cultures and backgrounds celebrate Cinco de Mayo. But do most of them actually know why they’re celebrating?

This video shows one guy explaining to his friend what Cinco de Mayo is, what Cinco de Mayo isn’t, and why he’s a fool for getting it all wrong.

Cinco de Mayo isn’t Mexican Independence Day. It also has nothing to do with mayonnaise. Cinco de Mayo is actually about Batalla de Puebla.

This is when outnumbered mexican forces defeated the French empire. Cinco de Mayo is therefore a celebration of Mexican resistance.

So now you know, and can carry on eating and drinking until you’re full.