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

Other days

chocolate milkshake

Chocolate Milkshake Day
coffee

Coffee Day
law

Law Day
self care

Self Care Day
tulip

Tulip Day
gum

Gum Day
lash

Lash Day
gallery

Gallery Day
kiss a ginger

Kiss A Ginger Day
self appreciation

Self Appreciation Day