This day () commemorates President Benito Juárez's birthday on March 21, 1806. Juárez is popularly regarded as Mexico's greatest president, who instituted the separation of Church and State in the "La Reforma" (Liberal Reform in Mexico). Juárez is recognized as a hero across the Americas for his resistance to European recolonization. Article 74 of the Mexican labor law ("Ley Federal del Trabajo") provides that the third Monday of March (regardless the date) will be an official holiday in Mexico. As with Constitution Day, the holiday was originally celebrated every year on the same date (March 21), but the federal labor law was modified in 2005 so the holiday is always celebrated on a Monday.