Amazing how they can't follow their own advice:
"Eager to see the end of this evil system, Jehovah's people have at times
speculated about the time when the "great tribulation" would break out, even
tying this to calculations of what is the lifetime of a generation since 1914.
However, we bring a heart of wisdom in, not by speculating about how many years
or days makeup a generation, but by thinking about how we "count our days" in
bringing joyful praise to Jehovah." (Watchtower Nov 1, 1995 p18)