Oops, it doesn't look like 'flag at a ceremony to mark independence day' is a national day..

Other days

donate your hair

Donate Your Hair Day
nae nae

Nae Nae Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boy friend

Boy Friend Day
hoodie

Hoodie Day
stress awareness

Stress Awareness Day
polyamory

Polyamory Day
tell a fairytale

Tell A Fairytale Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
self appreciation

Self Appreciation Day