Oops, it doesn't look like 'fuck a random follower day' is a national day..

Other days

fiancee

Fiancee Day
bounce

Bounce Day
camera

Camera Day
pumpkin

Pumpkin Day
hoodie

Hoodie Day
lash

Lash Day
one

One Day
ruby

Ruby Day
bow tie

Bow Tie Day
boba

Boba Day