It's a bit complicated, but consider in the context of "let the wheat and weeds grow together until the harvest..."
1874 - Christ's parousia did begin. This is when "Michael stands up" (Daniel 12:1).
1874 - Begins 120 years of Noah's last generation, 1874-1994.
1866 - Bible students become "temple in its right condition" for 110 years until 1996.
1914 - A world war, nation vs nation, kingdom vs kingdom, begins "last generation" of 80 years, 1914-1994
1914 - Begins vineyard work of 11 hours, 7 years each, 77 years from 1914-1991.
1935 - Third hour workers identified as "earthly class"; 3 x 7 = 21; 1914+21=1935. Two-class organization begins.
1940 - 7-year great tribulation (Holocaust) begins against Jews and JWs; cut short in Spring of 1945.
1947 - "End of the gentile times" on November 30, 1947.
1947 - End of 1290 days. Messiah arrives 45 years later to fulfill "1335 days" in 1992.
1947 - 70th jubilee of 49 years begins, 3430 years from 1435 BCE, ending in 1996.
1950 - Prodigal son "pre-messiah" born.
1960 - Prodigal son "pre-messiah" baptized, at age 10.
1989 - Beginning of 70th week of 2nd coming. "Two witnesses" point to 2nd coming, December 21, 1992.
1991 - End of 11 hours (77 years from 1914) of vineyard workers. "Last hour" begins, 1991-1998
1992 - WTS joins U.N.
1992 - November 10, "man of lawlessness revealed" as GB of JW.
1992 - December 21 (solstice) WTS/UN derail 2nd coming for 3.5 days, kill two witnesses.
1992 - December 22, Fred Franz executed by Jehovah for assisting UN to derail 2nd coming.
1992 - December 25, 2nd coming occurs, 3.5 days after prophesied date.
1992 - December 25, fulfills "1335 days" after MOL revealed on November 10.
1992 - December 26, glorius sign in the clouds appear confirming 2nd coming.
1994 - End of "last generations"; 80-year 1914-1994, 120-year 1874-1994.
1996 - End of temple covenant with JWs and end of Jewish covenant.
1998 - End of "last hour".
1998 - "Cry in the night" alerts 10 virgins messiah had arrived in 1992. Wise separate from foolish virgins.
2008 - May - Sealing of elect end (i.e. 1,440,000)
2011 - May 21 - Great tribulation begins?
2012 - December 21 - Millennial rule of Christ officially begins?