Matthew 24:21,22--For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be. And except those days should be shortened, there should be no flesh be saved, but for the elect's sake those days shall be shortened.
Matthew 24:29,30--Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from the heaven, and the powers of the heavens shall be shaken: And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.
Mathew 24:31--And he shall send his angles with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.
How true... but the Trumpet will sound seven years before this period called the tribulation. Pre Trib baby..