Oops, it doesn't look like 'flag to mark the formation day' is a national day..

Other days

Prosecco Day

Kiss A Ginger Day

Youth Day

Bubble Bath Day

Latina Equal Pay Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Pumpkin Day

Tell Ur Crush You Like Them Day

Hiv Awareness Day

Fiancee Day