Oops, it doesn't look like 'fuck philly day' is a national day..

Other days

book

Book Day
boy friend

Boy Friend Day
bonang

Bonang Day
get funky

Get Funky Day
one

One Day
lisp

Lisp Day
slime

Slime Day
self care

Self Care Day
frozen yogurt

Frozen Yogurt Day
girl friend

Girl Friend Day