Liberation Day is observed in Bulgaria on March 3 every year, commemorating the country's liberation from the Ottoman Empire in 1878. This significant holiday marks the signing of the Preliminary Treaty of San Stefano, which concluded the Russo-Turkish War and granted Bulgaria the status of an autonomous principality. The treaty allowed for a Christian government and the formation of a Bulgarian army while requiring the withdrawal of Ottoman troops. However, the principality was never fully realized as the Treaty of San Stefano was later suppressed by the Treaty of Berlin, which alarmed neighboring countries like Great Britain and France. The day serves as a reminder of Bulgaria's struggle for independence and is celebrated with various events and ceremonies throughout the country.