Jesus said it would be at a time you think not...jws always forget that scripture.
(Matthew 24:44) . . .On this account YOU too prove yourselves ready, because at an hour that YOU do not think to be it, the Son of man is coming.
*** w03 1/1 pp. 17-18 par. 2 “Keep on the Watch”! ***
To show how vital it is to stay awake, Jesus used the illustration of a thief. He described the events that would lead up to his coming as Judge, and then he warned: “Keep on the watch, therefore, because you do not know on what day your Lord is coming. But know one thing, that if the householder had known in what watch the thief was coming, he would have kept awake and not allowed his house to be broken into. On this account you too prove yourselves ready, because at an hour that you do not think to be it, the Son of man is coming.” (Matthew 24:42-44) A thief does not announce in advance when he is coming. He hopes to arrive when no one is expecting him. Similarly, as Jesus said, the end of this system will come at ‘an hour that we do not think to be it.’
*** g95 6/22 pp. 5-6 Why Many Believe the World Will End ***
Just three days before his death, Jesus had spoken similarly: “Keep on the watch, therefore, because you do not know on what day your Lord is coming.” He added: “Concerning that day or the hour nobody knows, neither the angels in heaven nor the Son, but the Father. Keep looking, keep awake, for you do not know when the appointed time is.” (Matthew 24:42, 44; Mark 13:32, 33) A few months earlier, Jesus had also encouraged: “Keep ready, because at an hour that you do not think likely the Son of man is coming.”—Luke 12:40.
Despite such cautions provided by Jesus, early Christians, eager for Christ’s presence and the blessings it would bring, began speculating about when Kingdom promises would be fulfilled. Thus, the apostle Paul wrote the Thessalonians: “Respecting the presence of our Lord Jesus Christ and our being gathered together to him, we request of you not to be quickly shaken from your reason nor to be excited either through an inspired expression or through a verbal message or through a letter as though from us, to the effect that the day of Jehovah is here.”—2 Thessalonians 2:1, 2.
Paul’s words indicate that some early Christians had developed erroneous expectations. Although the Christians in Thessalonica may not have predicted a particular date for their ‘being gathered to Christ in heaven,’ they clearly thought that event was at hand. They needed to have their views corrected, and Paul’s letter did this.