26 April 1986 - Chernobyl disaster

21. 8. 1968 - Invasion of the Warsaw Pact troops, 1976 – The Plastic People of the Universe trial, 26 April 1986 - Chernobyl disaster, 21. 8. 1988 – 17. 11. 1989 – Street demonstrations against the communist regime, 1989 - The fall of the iron curtain and 3 more anniversaries

1932 - 1933 - Holodomor - Great famine in Ukraine, 8. 5. 1945 - End of WWII, 1941-1944 - Nazi occupation of Ukraine, 26 April 1986 - Chernobyl disaster

21. 8. 1968 - Invasion of the Warsaw Pact troops, 1979 - 1989 - Sovětská invaze do Afghánistánu, 26 April 1986 - Chernobyl disaster, 2. 3. - 21. 7. 1992 - Konflikt v Podněstří

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

21. 8. 1968 - Invasion of the Warsaw Pact troops, 1989 - The fall of the iron curtain, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia, 29. 6. 1989 – Zveřejnění manifestu Několik vět, 26 April 1986 - Chernobyl disaster and 1 more anniversaries

Výjimečný stav v Polsku, 26 April 1986 - Chernobyl disaster, 25.3.1988 Candle demonstration in Bratislava, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia, 31. 12. 1992 Dissolution of Czechoslovakia

26 April 1986 - Chernobyl disaster, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia, 29. 6. 1989 – Zveřejnění manifestu Několik vět

26 April 1986 - Chernobyl disaster, Perestroika, The Orange Revolution of 2004, The Revolution of Dignity (21.11. 2013 – 22.02. 2014), 2022 - full scale invasion of Russia into Ukraine

Ukraine in 1990-s., The Repressions of the totalitarian regime in the 1970s in Ukraine, Perestroika, Ukraine in 1986–1991, 26 April 1986 - Chernobyl disaster and 5 more anniversaries

Ukraine in 1990-s., Ukrainian student discontent (1980 - 1990), Perestroika, 26 April 1986 - Chernobyl disaster, The Orange Revolution of 2004 and 1 more anniversaries