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

Other days

youth

Youth Day
believe

Believe Day
lumpy rug

Lumpy Rug Day
lash

Lash Day
boy friend

Boy Friend Day
pick me

Pick Me Day
donate your hair

Donate Your Hair Day
brow

Brow Day
blanket fort

Blanket Fort Day
prosecco

Prosecco Day