5. 1. - 21. 8. 1968 - The Prague Spring, 19. – 21. 11. 1968 – The three-day student strike and other displays of civil r, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 21. – 28.3.1969 – Disorders related to the celebration of Czech hockey team’s, 17. 4. 1969 – A. Dubček’s resignation, start of the “normalisation” period and 6 more anniversaries

26 April 1986 - Chernobyl disaster

Ukraine in 1990-s., 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia, 2022 - full scale invasion of Russia into Ukraine, 26 April 1986 - Chernobyl disaster

Ukraine in 1990-s., 1936 - 1938 - Great Terror in the USSR, The Khrushchev Thaw 1953 – 1964, 21. 8. 1968 - Invasion of the Warsaw Pact troops, Ukraine in 1986–1991 and 1 more anniversaries

26 April 1986 - Chernobyl disaster, 17. 11. 1989 - Demonstration at Národní třída, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 18. - 21. 8. 1969 – mass demonstrations against Soviet occupation, 1989 - The fall of the iron curtain and 5 more anniversaries

25. 2. 1948 - Communist coup d‘état in ČSR, 5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 16. 1. 1969 – Jan Palach´s self-immolation , 17. 4. 1969 – A. Dubček’s resignation, start of the “normalisation” period and 2 more anniversaries

21. 8. 1968 - Invasion of the Warsaw Pact troops, 26 April 1986 - Chernobyl disaster

26 April 1986 - Chernobyl disaster

25. 2. 1948 - Communist coup d‘état in ČSR, 30. 5. 1953 – 3. 6. 1953 – The monetary reform and subsequent public upheaval, 23. 10. 1956 - Hungarian revolution of 1956 and fightings for independence, 5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops and 8 more anniversaries

21. 8. 1968 - Invasion of the Warsaw Pact troops, 26 April 1986 - Chernobyl disaster, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia