Oops, it doesn't look like 'cemetery needs help pulling flags from memorial day' is a national day..

Other days

ormille

Ormille Day
bow tie

Bow Tie Day
slime

Slime Day
emoji

Emoji Day
lost sock memorial

Lost Sock Memorial Day
polyamory

Polyamory Day
self appreciation

Self Appreciation Day
boy friend

Boy Friend Day
one

One Day
stud

Stud Day