When the flag is paraded in front of a crowd, those in military uniform must present a salute according to military regulations. Civilians who are present give the following salute to the national flag: standing at attention ("firmes"), they raise their right arms and place their right hands on their chests, in front of the heart. The hand is flat and the palm of the hand is facing the ground. This salute is known as the "El saludo civil a la Bandera Nacional" ("The Civil Salute to the National Flag"). When the President is acting in the capacity of the Head of the Armed Forces, he salutes the national flag with a military salute. When the national anthem is played on television to open or close daily programming, the national flag will be shown at the same time. During certain times of the year, the flag is flown by both civilians and government personnel. Mostly, these events coincide with national holidays and days of significance to the country. During some of these occasions, the flag will be flown at half-mast to honor the death of important Mexicans. These dates are listed in Article 18 of the Law of the National Flag, Arms and Anthem. The national "Día de la Bandera" (Flag Day) celebration occurs on February 24. On this day in 1821, all the factions fighting in the War of Independence joined together to form the Army of the Three Guarantees in response to the Plan de Iguala, which was signed by Vicente Guerrero and Agustín de Iturbide, declaring Mexico officially an independent country. General Vicente Guerrero was the first military official who swore allegiance to the national flag. Another flag tradition is that before every Olympics in which Mexico is a participant, the President hands a flag over to the flag bearer, chosen by their peers, to carry with them to the host city.