site.btaObservances: September 10

The world: 

- National Day of Gibraltar. Commemorates first referendum of 1967, in which Gibraltarians choose to remain under British sovereignty.

On this date in Bulgarian history:

1855: First telegram from Constantinople received in Shoumen. Beginning of telegraph communications.

1944: Bulgaria joins anti-Hitler coalition of World War II.

1991: Diplomatic relations established with Lithuania.

1991: Diplomatic relations with Estonia and Latvia restored. First established in 1920 (Estonia) and 1922 (Latvia).

1992: World Bank opens Resident Mission in Sofia. 

2003: Parliament ratifies UNESCO Convention on the Protection of the Underwater Cultural Heritage, adopted 2001.