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

Other days

cuddle up

Cuddle Up Day
bonang

Bonang Day
gum

Gum Day
lumpy rug

Lumpy Rug Day
kiss a brunette

Kiss A Brunette Day
offer

Offer Day
coffee

Coffee Day
blanket fort

Blanket Fort Day
nae nae

Nae Nae Day
tulip

Tulip Day