Events in the year 1946 in Bulgaria. Incumbents Monarch – Simeon II (until September 15) Regency council Acting President – Vasil Kolarov (after September 15) Events 8 September – A referendum was held in Bulgaria on whether to become a republic. The result were unanimously in favour of the change, with 95.6% supporting and with 91.7% voter turnout. Sports References 1940s in Bulgaria Years of the 20th century in Bulgaria Bulgaria Bulgaria