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

Other days

ride the wind

Ride The Wind Day
pampering

Pampering Day
comfy

Comfy Day
brow

Brow Day
tulip

Tulip Day
ponytail

Ponytail Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
ruby

Ruby Day
fiancee

Fiancee Day
coffee

Coffee Day