Oops, it doesn't look like 'mind yo damn business for a day' is a national day..

Other days

lash

Lash Day
ruby

Ruby Day
lumpy rug

Lumpy Rug Day
slime

Slime Day
emoji

Emoji Day
china

China Day
blanket fort

Blanket Fort Day
fiancee

Fiancee Day
ride the wind

Ride The Wind Day
boba

Boba Day