Oops, it doesn't look like 'flag raises black flags during republic day' is a national day..

Other days

One Day

Donate Your Hair Day

Camera Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Appreciate Yaself A Lil Extra Day

Carpenters Day

Stud Day

Tell Ur Crush You Like Them Day

Lash Day

Ask Out Your Crush Day