Oops, it doesn't look like 'flag at party headquarters on day' is a national day..

Other days

buddy

Buddy Day
tell a fairytale

Tell A Fairytale Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
special education

Special Education Day
brow

Brow Day
first love

First Love Day
polyamory

Polyamory Day
pampering

Pampering Day
bubble bath

Bubble Bath Day