Oops, it doesn't look like 'outrage when greeters at retail stores use day' is a national day..

Other days

camera

Camera Day
bounce

Bounce Day
latina equal pay

Latina Equal Pay Day
self appreciation

Self Appreciation Day
lumpy rug

Lumpy Rug Day
tell a fairytale

Tell A Fairytale Day
nae nae

Nae Nae Day
martini

Martini Day
self care

Self Care Day
polyamory

Polyamory Day