Oops, it doesn't look like 'tight ends tight end day' is a national day..

Other days

gum

Gum Day
unicorn

Unicorn Day
slime

Slime Day
buddy

Buddy Day
mean girls

Mean Girls Day
lumpy rug

Lumpy Rug Day
cuddle up

Cuddle Up Day
law

Law Day
girl friend

Girl Friend Day
kiss a ginger

Kiss A Ginger Day