The Millennium of the Polish State (, literally "A Thousand Years of the Polish State") was a national celebration of the Christianization of Poland and the subsequent establishment of the first Polish nation. The celebrations took place over the years 1960–1966 by a resolution of the Sejm in 1958. The inauguration of the jubilee celebrations took place at the plenary session of the National Committee of the Unity Front on 16 February 1960 in Kalisz. The jubilee celebrations were accompanied by the educational program "One thousand schools for the 1000th anniversary" during which in the years 1959–1972 nearly 1.5 thousand schools were built. It was decided to use the anniversary by both the hierarchy of the Catholic Church and the Polish United Workers' Party for the propaganda in Poland. The church planned the celebration of the millennium of the baptism of Poland while the state authorities strictly commemorated the jubilee of the beginnings of the Polish nation.