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

Other days

tell a fairytale

Tell A Fairytale Day
comfy

Comfy Day
singles

Singles Day
embarrass your best friend

Embarrass Your Best Friend Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
special education

Special Education Day
boy friend

Boy Friend Day
coffee

Coffee Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
kiss a ginger

Kiss A Ginger Day