26 April 1986 - Chernobyl disaster

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, 18. - 21. 8. 1969 – mass demonstrations against Soviet occupation, 1. 1. 1977 - Declaration of Chart 77 and 4 more anniversaries

1944 - 1945 - The liberation of Czechoslovakia, 8. 5. 1945 - End of WWII, 25. 2. 1948 - Communist coup d‘état in ČSR, 26 April 1986 - Chernobyl disaster

27. 5. 1942 - Assassination of R. Heydrich, 26 April 1986 - Chernobyl disaster, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 25. 2. 1948 - Communist coup d‘état in ČSR, 8. 5. 1945 - End of WWII and 5 more anniversaries

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

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, 16. 1. 1969 – Jan Palach´s self-immolation , 25. 1. 1969 Jan Palach´s funeral and 1 more anniversaries

8. 5. 1945 - End of WWII, 5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 26 April 1986 - Chernobyl disaster, 1989 - The fall of the iron curtain and 1 more anniversaries

31. 5. – 8. 6. 1950 – Milada Horáková’s trial, 5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 18. - 21. 8. 1969 – mass demonstrations against Soviet occupation, 26 April 1986 - Chernobyl disaster and 2 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

5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 26 April 1986 - Chernobyl disaster, 21. 8. 1988 – 17. 11. 1989 – Street demonstrations against the communist regime, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

The liberation of the city of Wiena, 1948 - 1955 - Politic lawsuit in the Stalin age, 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 and 6 more anniversaries