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

Other days

boy friend

Boy Friend Day
boba

Boba Day
chocolate milkshake

Chocolate Milkshake Day
cursing

Cursing Day
slime

Slime Day
gum

Gum Day
buddy

Buddy Day
nae nae

Nae Nae Day
kiss a ginger

Kiss A Ginger Day
cuddle up

Cuddle Up Day