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

Other days

boy friend

Boy Friend Day
brow

Brow Day
pampering

Pampering Day
ruby

Ruby Day
mean girls

Mean Girls Day
kiss a ginger

Kiss A Ginger Day
tulip

Tulip Day
self care

Self Care Day
lost sock memorial

Lost Sock Memorial Day
comfy

Comfy Day