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

Other days

gallery

Gallery Day
kiss a brunette

Kiss A Brunette Day
bow tie

Bow Tie Day
hoodie

Hoodie Day
get funky

Get Funky Day
cuddle up

Cuddle Up Day
gum

Gum Day
pumpkin

Pumpkin Day
slime

Slime Day
coffee

Coffee Day