Oops, it doesn't look like 'flags from balconies on independence day' is a national day..

Other days

Donate Your Hair Day

Chocolate Milkshake Day

Cuddle Up Day

Pumpkin Day

Cat Girl Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Boy Friend Day

Tell Ur Crush You Like Them Day

Stud Day

Unicorn Day