Jesus said that you will hear of wars and rumours of war, earthquakes, etc, but the end is not yet. He then went on to spell what the signs would be. One is the man of sin committing the abomination of desolation (desecrating the temple) which occurs 3 1/2 years after he has confirmed a covenant with the many.
You may be interested in the link above as well. It's a good online book. It mentions all that stuff. What interesting is this was written a few years ago, before recent events happened.
I sure hope Believers are not here to see that.
In any case, we must walk close to God. In any era, none of us have promise of tomorrow.