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

Other days

lash

Lash Day
my little pony

My Little Pony Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
nae nae

Nae Nae Day
kiss a ginger

Kiss A Ginger Day
brow

Brow Day
ask out your crush

Ask Out Your Crush Day
stress awareness

Stress Awareness Day
kiss a brunette

Kiss A Brunette Day
self care

Self Care Day