site.btaObservances: October 1

The world: 

• International Music Day;
• National Day of China: Declaration of the People's Republic (1949);
• National Day of Cyprus: Independence Day (1960);
• National Day of Nigeria: Independence Day (1960);
• National Day of Palau: Independence Day (1994);
• National Day of Tuvalu: Independence Day (1978).

On this date in Bulgarian history:

• 1888: Sofia University, Bulgaria's oldest institution of higher education, opens.
• 1915: King Ferdinand I declares war on Serbia and Bulgaria enters World War I (1914-1918) on the side of the Central Powers.
• 1947: Diplomatic relations with the US are restored. First established in 1901 at  legation level; promoted to embassy level in 1966.
• 1961: A Higher Medical Institute is set up in Varna. Transformed into a Medical University in 1995.
• 1992: The Agency for Bulgarians Abroad is set up.