I won't keep this a secret. I want to celebrate Vidovdan or St. Vitus's day. But to Serbs, both spiritual and national day of celebration for it symbolizes the martyrdom of Saint Prince Lazar in the battle of Kosovo and thousands of Serbs for protecting Kosovo and Serbia from waves of Turkish invasions. Not to mention some events that occured on the same date.
- on June 28, 1389, according to the Serbian Orthodox religious tradition, and the Serbian romantic (19th century) national identity founding myth, the Ottoman Empire defeats Serbia in the Battle of Kosovo with Prince Lazar slain in battle. Ottoman Sultan Murad I is killed by Serbian knight Miloš Obilić on that day.
- on June 28, 1881, a secret treaty between Austria-Hungary and Serbia is signed with Serbia earning the right to be recognized as a monarchy in exchange of surrendering its independence to the Habsburg Empire.
- on June 28, 1914 the assassination by Gavrilo Princip of the Austro-Hungarian crown prince, Franz Ferdinand, triggers the First World War.
- on June 28, 1919, the Treaty of Versailles is signed ending World War I.
- on June 28, 1921, the Serbian King Alexander I proclaims the new Constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution (Vidovdanski ustav).
- on June 28, 1948, the Cominform publishes, on the initiative of its Soviet delegates Zhdanov, Malenkov and Suslov, in a "Resolution on the State of the Communist Party of Yugoslavia" their condemnation of the Yugoslavian communist leaders - this event is seen as the turning point that marks the final split between Stalin's Soviet Union and Tito's Yugoslavia.
- on June 28, 1989, on the 600th anniversary of the battle of Kosovo, Serbian leader Slobodan Milošević delivers the Gazimestan speech on the site of the historic battle.
- on June 28, 1990, an amendment is brought to the Constitution of Croatia changing the status of Serbs from constituent people (konstitutivni narod) of the Croatian nation to national minority.
- on June 28, 2001, Slobodan Milošević is deported to the ICTY to stand trial.
- on June 28, 2006, Montenegro is announced as the 192nd member state of the United Nations.
- on June 28, 2008 takes place the inaugural meeting of the Community Assembly of Kosovo and Metohija