Oops, it doesn't look like 'single as hell day' is a national day..

Other days

ormille

Ormille Day
bubble bath

Bubble Bath Day
pick me

Pick Me Day
offer

Offer Day
pumpkin

Pumpkin Day
self care

Self Care Day
bow tie

Bow Tie Day
girl friend

Girl Friend Day
stud

Stud Day
brow

Brow Day