Oops, it doesn't look like 'Goofing Off day' is a national day..

Other days

pick me

Pick Me Day
slime

Slime Day
prosecco

Prosecco Day
one

One Day
stud

Stud Day
prescription drug take back

Prescription Drug Take Back Day
bow tie

Bow Tie Day
bounce

Bounce Day
bubble bath

Bubble Bath Day
tulip

Tulip Day