site.btaObservances: September 18

The world:

- National Day of Chile. Independence Day (1810).
    
On this date in Bulgarian history:

1918: Entente troops take offensive against Bulgarian army on Southern Front in World War I (1914-1918).

1944: First legal issue of "Rabotnichesko Delo" newspaper comes out, published by Bulgarian Workers' Party Central Committee.

1960: Diplomatic relations established with Cambodia.

2008: Bulgarian Energy Holdings set up as wholly State-owned joint-stock company.