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

Other days

tulip

Tulip Day
cursing

Cursing Day
gum

Gum Day
bubble bath

Bubble Bath Day
promposal

Promposal Day
believe

Believe Day
ride the wind

Ride The Wind Day
bow tie

Bow Tie Day
latina equal pay

Latina Equal Pay Day
lisp

Lisp Day