(Note: Serbia remained on the Julian calendar until 10 January 1919, when the Kingdom of the Serbs, Croats and Slovenes adopted the Gregorian calendar. During the 19th century, the Julian calendar was 12 days behind the Gregorian calendar, and the difference became 13 days in the 20th century. Thus, Atanacković's birth date of 24 March 1848 was on 5 April 1848 in the Gregorian calendar. However, his death date of 9 August 1921 was on that day on the Gregorian calendar used in Serbia.) Jovan Atanacković (Serbian Cyrillic: Јован Атанацковић, 24 March 1848 – 9 August 1921) was a Serbian general,