site.btaToday's Observances: September 12
![Today's Observances: September 12](/upload/1914262/DJI_0395.jpg?l=1000)
![Today's Observances: September 12](/upload/1914262/DJI_0395.jpg?l=1000&original=)
The world:
- International Day for South-South Cooperation;
- World Oral Health Day.
On this date in Bulgarian history:
1924: Sofia's St Alexander Nevsky Memorial Cathedral is consecrated.
1945: Higher Air Force School is established in Sofia. Moves to Vrazhdebna in 1946, then to Dolna Mitropolia in 1948.
1947: First international air service, between Sofia and Budapest, is launched.
1959: Diplomatic relations with Japan, severed on November 6, 1944, are restored.
1997: Ferry service linking Bourgas with Novorossiysk (Russia) and Poti (Georgia) goes into operation.
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