site.btaObservances: September 25

Bulgaria:

- Day of the Bulgarian Armed Forces signals and information support troops.

- Day of Dobrich (Northeastern Bulgaria).

On this date in Bulgarian history:

1396: At Nikopol, Sultan Bayazid defeats West European crusaders led by Hungarian King Sigismund and leads Bulgarian Tsar Ivan Stratsimir into captivity. Bulgaria falls under Ottoman rule.

1937: Chamber of Engineers and Architects (now Chamber of Architects in Bulgaria) is established. 

1940: Romanian occupation of City of Dobrich ends under Treaty of Craiova.

1944: Bulgaria severs its diplomatic relations with Hungary (established on August 9, 1920 at legation level, restored on June 18, 1947, promoted to embassy level on February 13, 1954).

1951: Bulgarian News Agency (BTA) becomes autonomous national news organization.

1983: 2,000-seat building of the Sofia State Circus next to Vuzrazhdane Square, built in 1962, burns down in a fire. It is never restored.

1990: Bulgaria joins World Bank and International Monetary Fund.

1996: Bulgaria signs Comprehensive Nuclear Test Ban Treaty.

2008: National Assembly ratifies Police Cooperation Convention for Southeast Europe, signed in Vienna on May 5, 2006 by Albania, Bosnia and Herzegovina, Macedonia, Moldova, Romania, and Serbia and Montenegro.