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

Other days

bow tie

Bow Tie Day
slime

Slime Day
lumpy rug

Lumpy Rug Day
tulip

Tulip Day
gum

Gum Day
china

China Day
my little pony

My Little Pony Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
first love

First Love Day
boba

Boba Day