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

Other days

law

Law Day
carpenters

Carpenters Day
kale

Kale Day
aloxolt

Aloxolt Day
girl friend

Girl Friend Day
lumpy rug

Lumpy Rug Day
bow tie

Bow Tie Day
buddy

Buddy Day
kiss a ginger

Kiss A Ginger Day
boy friend

Boy Friend Day