1966 (MCMLXVI) was a year that, according to the Gregorian calendar, began on Saturday.
For the first time, an official nationwide beauty contest called Girl of the Year was held. The then nineteen-year-old model from Prague - Dagmar Silvínová - won.
Rešov Waterfalls and Velký Roudný have been declared national natural monuments.
January 7 - The construction of an underground tram was ceremoniously started in Opletalova Street near the Main Railway Station in Prague. The project was later changed to a subway.
March 17 - The National Assembly adopts a new Act on Higher Education Institutions, which regulated in particular the award of academic degrees. The titles introduced by the word "graduated" were abandoned and classical titles such as MUDr., MVDr., Ak. painter, etc. Graduates of universities other than medicine or art were awarded the titles only after passing additional rigorous examinations - they were, for example, the titles of Doctor of Laws (JUDr.), Doctor of Science (RNDr.) or Doctor of Philosophy (PhDr.)
April 18 - The creators of the film Obchod na korze - Ján Kadár and Elmar Klos - won the Oscar at the American Academy of Motion Picture Arts and Sciences Awards in Santa Monica, California.
May 2 - Railway accident in Deštnice - At a railway crossing in Deštnice in the Louny region, a truck transporting students to a hop brigade collided with a train traveling along the railway line from Lužná u Rakovníka to Žatec. The tragedy claimed 10 lives and injured 37.
May 12 - The international exhibition of automatic computers INCOMEX was opened in Prague, where companies from Western Europe and the USA presented their products.
May 31 - June 4 - XIII. the Congress of the Communist Party, which, despite the continuing influence of the old structures under the leadership of Antonín Novotný, meant a certain strengthening of the power of the reform communists. On the last day of the congress, economist Ota Šik spoke, stating that within four years it would be necessary to find new forms of political governance.
June 25 - The first year of the Ex Plzeň food, gastronomy and tourism exhibition was opened in Pilsen.
August 19 - A strong hail storm hit the Prostějov region in the evening. It caused the greatest damage in the villages of Konice and Vojtěchov.
20-25 September - An exercise of the armies of the states of the Warsaw Pact - Vltava took place on the territory of Czechoslovakia, which was attended by military units from the Czechoslovak Socialist Republic, the USSR, the GDR and Hungary.
September 28 - The two murderess Irena Čubírková was executed in Prague's Pankrác district, who brutally murdered her husband and friend in 1951 and 1964.
October 27 - The law on IV. five-year plan for 1966–1970. During his discussion, Antonín Novotný strongly warned against weakening the company's centralized management.
November 26 - The last new railway line in the Czechoslovak Railways network was put into operation - the Podolínec - Plaveč line in eastern Slovakia, in the district of Stará Ľubovňa (then in the districts of Poprad and Prešov), with a length of 30 km.
May 24 - A bloody attack by the Ugandan army under General Idi Amin on the palace of the Bugang king.
May 6 - Swamp killers Ian Brady and Myra Hindley are sentenced to life in prison.
July 13 - A. No. Bhaktivedanta Swami Prabhupada establishes the International Society for Krishna Consciousness (ISKCON), New York.
September 30 - Baldur von Schirach and Albert Speer are released from prison.
October 14 - The Dutch Social Liberal Party Democrats 66 is founded.
November 24 - The biggest plane crash in Czechoslovakia - Flight TABSO LZ101 crashed near Bratislava.
The first World Orienteering Championships.
End of car manufacturer Studebaker.