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

Other days

tulip

Tulip Day
lumpy rug

Lumpy Rug Day
nae nae

Nae Nae Day
offer

Offer Day
ride the wind

Ride The Wind Day
comfy

Comfy Day
boy friend

Boy Friend Day
gum

Gum Day
gallery

Gallery Day
book

Book Day