Oops, it doesn't look like 'happy hour pizza day' is a national day..

Other days

fiancee

Fiancee Day
cuddle up

Cuddle Up Day
frozen yogurt

Frozen Yogurt Day
get funky

Get Funky Day
pick me

Pick Me Day
tulip

Tulip Day
bonang

Bonang Day
stud

Stud Day
hoodie

Hoodie Day
unicorn

Unicorn Day