St. Patrick's Day: drinking Irish beer.
MLK day: drinking on Monday (possibly with your black friends).
Halloween: drinking in a ridiculous costume.
Thanksgiving: drinking with your entire family.
Christmas: drinking eggnog; New Year's- Drinking your parents' fancy wine.
Boxing day: drinking Canadian beer.
Valentine's day: Drinking alone.
Easter: Drinking fruity cocktails while doing something that will inevitably end up online tomorrow.
4th of July: drinking in an obnoxious flag tee shirt while your uncle cooks burgers.
Cinco de Mayo: drinking in a sombrero (possibly with your Mexican friends, although probably not).
BONUS. Passover: Drinking manischewitz with the mishpocha.