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

Other days

fiancee

Fiancee Day
boy friend

Boy Friend Day
gum

Gum Day
cursing

Cursing Day
hoodie

Hoodie Day
polyamory

Polyamory Day
book

Book Day
kiss a ginger

Kiss A Ginger Day
girl friend

Girl Friend Day
lumpy rug

Lumpy Rug Day