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

Other days

offer

Offer Day
kiss a ginger

Kiss A Ginger Day
stud

Stud Day
self appreciation

Self Appreciation Day
eat what you want

Eat What You Want Day
hoodie

Hoodie Day
buddy

Buddy Day
kale

Kale Day
reading

Reading Day
first love

First Love Day