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

Other days

boba

Boba Day
cuddle up

Cuddle Up Day
pampering

Pampering Day
mean girls

Mean Girls Day
ruby

Ruby Day
self care

Self Care Day
promposal

Promposal Day
brow

Brow Day
blanket fort

Blanket Fort Day
comfy

Comfy Day