Granted that speculation of 'when' exactly is arguable, the essence of this teaching from the Bible is well substantiated in terms of events and signs. Those who profess Christ as Lord should study it for themselves because at worst you will be aware that these times are clearly described in the Bible, and at best you will reconsider how exactly you are redeeming your time and are in the faith in preparation for the return of Christ and Christians being gathered up to be with him.