Oops, it doesn't look like 'flag made of balloons at the assembly ahead of independence day' is a national day..

Other days

Gum Day

Carpenters Day

Hoodie Day

Offer Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Azonto Is Acceptable Day

Boba Day

Donate Your Hair Day

Frozen Yogurt Day

Eat What You Want Day