Oops, it doesn't look like 'single as hell day' is a national day..

Other days

buddy

Buddy Day
cat girl

Cat Girl Day
stud

Stud Day
lumpy rug

Lumpy Rug Day
law

Law Day
bonang

Bonang Day
my little pony

My Little Pony Day
polyamory

Polyamory Day
ormille

Ormille Day
cuddle up

Cuddle Up Day