Día de la Bandera (“Flag Day”) is a national holiday in Mexico. Flag Day is celebrated every year on February 24 since its implementation in 1937. It was established by the President of Mexico, General Lázaro Cárdenas, before the monument to General Vicente Guerrero, first to pledge allegiance to the Mexican flag on March 12, 1821.
When the Pledge is recited, it is customary to salute the flag with the raised arm Bellamy Salutewhile speaking. When the flag is being paraded, the arm is held across the chest, palm parallel to the ground. (Special Thanks To Wikipedia.com).