Oops, it doesn't look like 'Gf Or Sister day' is a national day..

Other days

kale

Kale Day
brow

Brow Day
lisp

Lisp Day
ponytail

Ponytail Day
camera

Camera Day
self care

Self Care Day
cursing

Cursing Day
gum

Gum Day
ride the wind

Ride The Wind Day
azonto is acceptable

Azonto Is Acceptable Day