1854 – Born on the 1st of July.
1880 – He graduated at Harvard College, studied at Paris, Berlin and Freiburg.
1883 – He received the degree of Ph.D. at Freiburg.
– He was instructor in history at Harvard.
1887 – Assistant professor.
1892 – Hart authored the book Formation of the Union.
1897 – Became professor.
– He was an editor of the Harvard Graduates’ Magazine.
1899 – Samuel Portland Chase.
1905 – Essentials of American History.
1906 – Slavery and Abolition.
1909 – Professor Hart was president of the American Historical Association.
– He played an important role in enabling his former student, W.E.B. Du Bois, to deliver his paper Reconstruction and Its Benefits to the AHA in New York.
1912 – The American Political Science Association.
1914 – He was appointed exchange professor at the University of Berlin.
1926 – Hart was editor of the American Year Book.
1927 – He edited a five-volume history of Massachusetts.
1930 – Worked as the official historian of the George Washington bicentennial commission.
1931 – Hart presented a rough draft of the cyclopedia to Hagedorn.
1943 – Died on the 16th of July.