May 24, 1991. The Ministry of Justice of Ukraine registered the Green Party of Ukraine.
1995. During Ukrainian President Leonid Kuchma’s official visit to Estonia a Declaration on Intensifying Cooperation and Partnership between the two countries was signed.
May 25, 1811. Feodosiya Museum of Antiquities, now Feodosiya Local History Museum, was founded.
1994. The Ministry of Justice of Ukraine registered the Human Rights Party.
May 26, 1648. The Bohdan Khmelnytsky’s Cossack Army defeated Polish troops near Korsun.
1920. The Ivan Mazepa government resigned in Vinnytsia and Supreme Otaman of the Direktoriya Semen Petliura appointed a new UNR government headed by Vyacheslav Prokopovych.
May 27, 1657. The Holy Roman Empire contracted an alliance with Rzeczpospolita, promising to render military assistance to Poland and mediate in its negotiations with Bohdan Khmelnytsky.
1821. The Mykolayiv Astronomy Observatory was founded.
May 28, 1920. The First issue of the Visti VUTsVK (News of the All-Ukrainian Executive Committee, now Holos Ukrayiny) was published.
1997. The heads of the governments of Ukraine and the Russian Federation signed a number of documents on the division and deployment of the Black Sea Navy.
May 29, 1917. Russian Minister of War Aleksandr Kerensky forbade holding the Second All-Ukrainian Military Congress.
1964. The biggest botanical garden in the USSR was opened in Kyiv.
May 30, 1876. Russian Tsar Alexander II signed the Ems Ukase prohibiting publishing and importing literature and holding theatrical presentations in the Ukrainian language.
1923. The Ukrainian History and Philology Society was founded in Prague.
