In December 1933, the convention of the ruling National Revolutionary Party (PNR) in Querétaro approved a Plan Sexenal, a plan for the six-year presidential term of 1934 to 1940. Lázaro Cárdenas was the party’s candidate for president. According to INEHRM, the government’s institute for historical studies, the plan was the platform of his candidacy.
Cárdenas won the election of July 1, 1934, and took office on December 1, 1934. Sources give the date of the plan’s approval as December 6 or December 7, 1933.