Expediente de concesión de la medalla del mérito al Trabajo a D. Ramón Menéndez Pidal, 1965 (Central Archive Ministry of Labour, Migration and Social Security)
On April 22, 1931, the still provisional government of the newly proclaimed Second Republic declared May 1 of each year a holiday of work as a sign of its commitment to the eight-hour day and the Washington Convention formulated at the first meeting of the International Labour Conference held in the American capital in 1919. Today, when the 100th anniversary of the International Labour Organization is celebrated, the Ministry of Labour, Migration and Social Security wants to congratulate the First of May by sharing the original of that Decree of 22 April 1931, as well as its publication in the Gaceta de Madrid. Happy Labor Party.