The End Of The World

For the Lord himself will descend from heaven with a
cry of command, with the voice an archangel, and
with the sound of trumpet God. And dead in
Christ will rise first.  I Thessalonians 4: 16

The Bible tells us that this physical world will come to an end one day.

It also tells us why the world will end (because it has been corrupted by sin), how the world will end (it will be destroyed with fire) and what happens after it is destroyed (there are a new heaves and a new earth put in place).

But the day of the Lord will come as unexpectedly as a thief. Then the heavens will pass away with a terrible noise, and the very elements themselves will disappear in fire, and the earth and everything on it will be found to deserve judgment. On that day, he will set the heavens on fire, and the elements will melt away in the flames. But we are looking forward to the new heavens and new earth he has promised, a world filled with God’s righteousness. II Peter 3: 10, 12b, 13

But the Bible also makes it clear that we will not know when the world is going to come to an end and says that we should not waste time trying to predict when the world will end.

Heaven and earth will disappear, but my words will never disappear. However, no one knows the day or hour when these things will happen, not even the angels in heaven or the Son himself. Only the Father knows. Mark 13: 31 – 32

Instead of worrying about or trying to predict when the world will end, we should simply be living for God.
Since everything around us is going to be destroyed like this, what holy and godly lives you should live. II Peter 3: 11