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

Other days

hoodie

Hoodie Day
blanket fort

Blanket Fort Day
chocolate milkshake

Chocolate Milkshake Day
reading

Reading Day
bow tie

Bow Tie Day
boy friend

Boy Friend Day
girl friend

Girl Friend Day
slime

Slime Day
ponytail

Ponytail Day
book

Book Day