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

Other days

unicorn

Unicorn Day
bow tie

Bow Tie Day
me

Me Day
prosecco

Prosecco Day
cuddle up

Cuddle Up Day
emoji

Emoji Day
cat girl

Cat Girl Day
ask out your crush

Ask Out Your Crush Day
stud

Stud Day
tell a fairytale

Tell A Fairytale Day