Radio Day in Armenia and Bulgaria
Radio Day in Armenia and Bulgaria is held on May 7. This event in the first decade of the month May is annual. 
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Radio Day in Armenia (Bulgarian: Äåí íà ðàäèîòî è òåëåâèçèÿòà, as it is known in Bulgaria) is marked on 7 May, the day in 1895 on which Alexander Popov successfully demonstrated his invention. Radio Day was first observed in the Soviet Union in 1945. It emphasises the importance and role of radio in political, social and cultural life of the country.
Similar holidays and events, festivals and interesting facts
Day of Bravery in Bulgaria on May 6 (also known as Gergyovden);
Saints Cyril and Methodius Day in Bulgaria on May 11
Slavonic Writing and Culture Day in Bulgaria on May 24
World Naturist Day on June 7 (Starts on the first Sunday of June in the northern hemisphere and on the first Sunday of December in the southern hemisphere);
Feast of Elijah on July 20 (Catholic Church, Eastern Orthodox Churches, and the Lutheran Church–Missouri Synod);
Beginning of the Orthodox Church Year on September 1
Unification Day in Bulgaria on September 6