Oops, it doesn't look like 'sports song on sports day' is a national day..

Other days

buddy

Buddy Day
first love

First Love Day
cuddle up

Cuddle Up Day
singles

Singles Day
stud

Stud Day
lumpy rug

Lumpy Rug Day
tulip

Tulip Day
kiss a brunette

Kiss A Brunette Day
one

One Day
camera

Camera Day