sociology - Vidovdan

Vidovdan is a religious holiday, St. Vitus' Day, observed on June 28 in the Serbian Orthodox calendar.

Vidovdan is also a date of historical importance:

on June 28, 1389 the Ottoman Empire defeated Serbia in the Battle of Kosovo
on June 28, 1914 the assassination in Sarajevo triggers the First World War
on June 28, 1921 the Serbian king proclaimed the new Constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution (Vidovdanski ustav)
on June 28, 1989 — the 600th anniversary of the battle of Kosovo — Serbian leader Slobodan Milosevic held an oft-cited speech at the site of the historic battle
on June 28, 2001 former Yugoslav leader Slobodan Milosevic was deported to The Hague to stand trial