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

Other days

gum

Gum Day
girl friend

Girl Friend Day
donate your hair

Donate Your Hair Day
mean girls

Mean Girls Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
china

China Day
lash

Lash Day
gallery

Gallery Day
boba

Boba Day
offer

Offer Day