Oops, it doesn't look like 'beat my meat day' is a national day..

Other days

pumpkin

Pumpkin Day
my little pony

My Little Pony Day
prosecco

Prosecco Day
cuddle up

Cuddle Up Day
cat girl

Cat Girl Day
boba

Boba Day
comfy

Comfy Day
buddy

Buddy Day
boy friend

Boy Friend Day
blanket fort

Blanket Fort Day