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

Other days

hiv awareness

Hiv Awareness Day
nae nae

Nae Nae Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
ask out your crush

Ask Out Your Crush Day
tell a fairytale

Tell A Fairytale Day
boy friend

Boy Friend Day
cat girl

Cat Girl Day
tulip

Tulip Day
my little pony

My Little Pony Day
first love

First Love Day