Oops, it doesn't look like 'make snook your avi day' is a national day..

Other days

hoodie

Hoodie Day
ruby

Ruby Day
one

One Day
comfy

Comfy Day
fiancee

Fiancee Day
donate your hair

Donate Your Hair Day
reading

Reading Day
kiss a ginger

Kiss A Ginger Day
brow

Brow Day
boy friend

Boy Friend Day