5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

21. – 28.3.1969 – Disorders related to the celebration of Czech hockey team’s

21. 8. 1968 - Invasion of the Warsaw Pact troops, 1. 1. 1977 - Declaration of Chart 77, Palach Week, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia, 17. 4. 1969 – A. Dubček’s resignation, start of the “normalisation” period

25. 2. 1948 - Communist coup d‘état in ČSR, 15. 3. 1939 - The Nazi occupation of ČSR, 1944 - 1945 - The liberation of Czechoslovakia, 26. 5. 1946 – The last “free” parliamentary election in Czechoslovakia

26.8.-11.9.1972 - Summer Games of the XX Olympiad , Munich