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

Other days

brow

Brow Day
boy friend

Boy Friend Day
get funky

Get Funky Day
kiss a ginger

Kiss A Ginger Day
emoji

Emoji Day
bow tie

Bow Tie Day
lost sock memorial

Lost Sock Memorial Day
unicorn

Unicorn Day
book

Book Day
cuddle up

Cuddle Up Day