Oops, it doesn't look like 'crab leg day' is a national day..

Other days

ponytail

Ponytail Day
brow

Brow Day
bow tie

Bow Tie Day
ormille

Ormille Day
youth

Youth Day
pick me

Pick Me Day
fiancee

Fiancee Day
hoodie

Hoodie Day
self care

Self Care Day
one

One Day