21. 8. 1968 - Invasion of the Warsaw Pact troops

21. 8. 1968 - Invasion of the Warsaw Pact troops, 21. 8. 1988 – 17. 11. 1989 – Street demonstrations against the communist regime, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

17. 11. 1939 – Closure of Czech universities, 8. 5. 1945 - End of WWII, 25. 2. 1948 - Communist coup d‘état in ČSR, 31. 10. 1967 – Spontaneous student demonstration in Prague, 5. 1. - 21. 8. 1968 - The Prague Spring and 4 more anniversaries

10. 7. 1946 – Agreement on Volhynian Czechs option with the USSR, 21. 8. 1968 - Invasion of the Warsaw Pact troops

1944 - 1945 - The liberation of Czechoslovakia, 21. 8. 1968 - Invasion of the Warsaw Pact troops

15. 3. 1939 - The Nazi occupation of ČSR, 1941 - 1945 - Transports to the concentration camps, 8. 5. 1945 - End of WWII, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

21. 8. 1968 - Invasion of the Warsaw Pact troops

29. 9. 1938 - The Munich Diktat, 1944 - 1945 - The liberation of Czechoslovakia, 25. 2. 1948 - Communist coup d‘état in ČSR, 21. 8. 1968 - Invasion of the Warsaw Pact troops

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

30. 5. 1945 – 29. 10. 1946 - Withdrawal of Germans from Czechoslovakia, 8. 5. 1945 - End of WWII, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia