Oops, it doesn't look like 'flag high on independence day' is a national day..

Other days

kiss a brunette

Kiss A Brunette Day
carpenters

Carpenters Day
prescription drug take back

Prescription Drug Take Back Day
boba

Boba Day
kiss a ginger

Kiss A Ginger Day
self appreciation

Self Appreciation Day
lumpy rug

Lumpy Rug Day
gum

Gum Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
azonto is acceptable

Azonto Is Acceptable Day