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

Other days

stress awareness

Stress Awareness Day

Emoji Day

china

China Day

fiancee

Fiancee Day

lisp

Lisp Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

youth

Youth Day

chocolate milkshake

Chocolate Milkshake Day

carpenters

Carpenters Day

latina equal pay

Latina Equal Pay Day