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

Other days

polyamory

Polyamory Day
hoodie

Hoodie Day
ruby

Ruby Day
brow

Brow Day
lumpy rug

Lumpy Rug Day
donate your hair

Donate Your Hair Day
pick me

Pick Me Day
chocolate milkshake

Chocolate Milkshake Day
boy friend

Boy Friend Day
gum

Gum Day