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

Other days

hoodie

Hoodie Day
kale

Kale Day
tulip

Tulip Day
prescription drug take back

Prescription Drug Take Back Day
nae nae

Nae Nae Day
first love

First Love Day
brow

Brow Day
girl friend

Girl Friend Day
ruby

Ruby Day
gum

Gum Day