Oops, it doesn't look like 'graves back in the day' is a national day..

Other days

tulip

Tulip Day
promposal

Promposal Day
me

Me Day
eat what you want

Eat What You Want Day
gum

Gum Day
kiss a brunette

Kiss A Brunette Day
bow tie

Bow Tie Day
self care

Self Care Day
lash

Lash Day
ormille

Ormille Day