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

Other days

buddy

Buddy Day
stud

Stud Day
kale

Kale Day
comfy

Comfy Day
hiv awareness

Hiv Awareness Day
bow tie

Bow Tie Day
hoodie

Hoodie Day
chocolate milkshake

Chocolate Milkshake Day
donate your hair

Donate Your Hair Day
get funky

Get Funky Day