- 1870 Charles Taze Russell begins his study of the Bible with a small group of associates
- 1877 The book "Three Worlds" is published identifying the date 1914 as the end of the "Gentile Times"
- 1879 "Zion's Watch Tower" beings publication with the July issue
- 1881 Zion's Watch Tower Tract Society is organized; a call for 1,000 colporteurs is issued
- 1884 Zion's Watch Tower Tract Society is chartered in the State of Pennsylvania
- 1886 "The Divine Plan of the Ages" is published as Vol. I of the six-book series "Millenial Dawn"
- 1889 The "Bible House" is constructed at Allegheny, Pennsylvania, as headquarters for the Society
- 1891 C.T. Russell makes his first trip abroad, extending his program of assistance to the congregations
- 1893 The first major convention is held at Chicago, Illionois, with 360 in attendance and 70 baptised
- 1894 Pilgrim work begins as the Scoiety's prgram of visiting the congregations continues to expand
- 1899 Volunteer work of free tract distribution at church doors on Sundays begins; all associated share
- 1900 The Society's first Branch office is opened in London, England
- 1909 Headquarters of the Society is moved to Brooklyn, New York, at 124 Columbia Heights
- 1911 Class extension work begins as an organized program to expand the congregations or "ecclesias"
- 1912 Preperation of the Photo-Drama of Creation beings as the world-wide preaching grows in intensity
- 1914 Photo-Drama of Creation begins showings in January
- 1916 C.T. Russell dies; Society is administered temporarily by a committee of three
- 1917 Joseph F. Rutherford is unanimously elected second president of the Society
- 1918 The Society's officers and some principal associates are imprisoned; the witness work is killed
- 1919 The Society's officers and associates are released from prison; the witness work is revived
- 1943 Theocratic Ministry School is established
- 1943 Gilead School begins - the 1st class is held in February
- 1977 Pioneer Service School is inaugurated in the United States and eventually extends to all parts of the earth
- 1987 Ministerial Training School is opened
- 01/2009 Family Worship Evening is introduced. The Congregation Book Study begins to be held on the same evening as the Theocratic Ministry School and Service Meeting
- 07/2009 A plot of land is purchased in Warwick, upstate New York, U.S.A., with plans to relocate the world headquarters
- 27/09/2012 Redesigned jw.org website launched
- 07/2013-08/2016 Warwick construction project
- 08/2016 Move to Warwick from Brooklyn
- 10/2014 The trial arrangement of JW Broadcasting is announced and the first monthly program is released
- 08/2015 JW Broadcasting starts to be translated into over 70 languages
- 12/2015-12/2018 The sale of 37 properties in Brooklyn
- 08/2017 Russia bans Jehovah's Witnesses as "extremist"
- 20/12/2017 Russia bans New World Translation
- 06/10/2018 Russia and allies indentified as "King of the North"