There is no definite date that when the world will end. There is no possible way to know it exactly.But there are some sayings like :-
(Matthew 24:36) . . .“Concerning that day and hour nobody knows, neither the angels of the heavens nor the Son, but only the Father.
(Ecclesiastes 1:4) . . .A generation is going, and a generation is coming; but the earth is standing even to time indefinite.

This “world” will end when the planet is destroyed and all life on it dies out. Whether that is by exploding star, colliding galaxy, or rogue planet… I am not sure. More than likely it will occur after you and I are both long dead and forgotten, so don’t worry about it.
Source(s):
Student of Psychology, Sociology, and Nonprofit Administration at Western Illinois U