He awaits the rainy season, knowing that harvest follows. He instructs us to stabilize ourselves, and not be so anxious and agitated about an imminent coming of Christ. But it does not mean it is about to occur immediately. Yes, we are to fix our hope on Christ's soon return. But, we are not to be unduely anxious or agitated, supposing that it is imminent, when the signs given by Jesus have not yet occurred.
Lets look at why such dates have always failed.
Most Evangelical Christians recognize that this is a definate prophecy of the length of time until both the first and second coming of Christ. Hence, there is a gap between the crucifixion and the beginning of the last seven years. This will not be changed. So, as far as we are concerned, once the 70th week begins, there will be no stopping the second coming of Christ after 7 years. However, we can not determine the time of Christ's coming prior to the beginning of the 70th week.