A flag day is a flag related holiday. It might be a day designated for flying
a national flag, or a day to celebrate nation's adoption of its flag.
It is celebrated on June 14. It commemorates the adoption of the flag of the
United States, which happened that day by resolution of the Second Continental
Congress in 1777, is not an official federal holiday.
The below countries celebrate the day as a national holiday.
Argentina, celebrated on June 20th. It is the Anniversary of the death of Manuel
Belgrano, who created the current flag.
Aruba, it was adopted on 18 March 1976. The Day is called as
National Flag & Anthem Day.
Faroe Islands, celebrated on 25th April.
Haiti, Flag and University Day is celebrated on May 18th.
Liberia, National Flag Day is on 24th August.
Mexico, It is celebrated on February 24th.
Panama, is adopted on 4th November.
Swaziland, celebrates National Flag Day on 25th April.
Turkmenistan, celebrated on 19th February.
Venezuela, It is celebrated on 3rd August.