Oops, it doesn't look like 'party about to call it a day' is a national day..

Other days

gum

Gum Day
me

Me Day
offer

Offer Day
ormille

Ormille Day
ruby

Ruby Day
bow tie

Bow Tie Day
unicorn

Unicorn Day
lash

Lash Day
lost sock memorial

Lost Sock Memorial Day
hoodie

Hoodie Day