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

Other days

comfy

Comfy Day
camera

Camera Day
first love

First Love Day
pick me

Pick Me Day
chocolate milkshake

Chocolate Milkshake Day
self appreciation

Self Appreciation Day
ruby

Ruby Day
boy friend

Boy Friend Day
me

Me Day
gum

Gum Day