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

Other days

stud

Stud Day
boba

Boba Day
artists

Artists Day
pampering

Pampering Day
kiss a brunette

Kiss A Brunette Day
pick me

Pick Me Day
lisp

Lisp Day
ride the wind

Ride The Wind Day
gum

Gum Day
bonang

Bonang Day