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

Other days

pick me

Pick Me Day
ask out your crush

Ask Out Your Crush Day
bow tie

Bow Tie Day
kiss a ginger

Kiss A Ginger Day
singles

Singles Day
martini

Martini Day
ormille

Ormille Day
lisp

Lisp Day
artists

Artists Day
mean girls

Mean Girls Day