Oops, it doesn't look like 'pirate grilled cheese day' is a national day..

Other days

gum

Gum Day
ask out your crush

Ask Out Your Crush Day
bow tie

Bow Tie Day
cuddle up

Cuddle Up Day
lisp

Lisp Day
healing

Healing Day
believe

Believe Day
prosecco

Prosecco Day
tulip

Tulip Day
law

Law Day