What Acts Chapter 1 teaches us about End Times and the Return of Jesus Christ

6Therefore, when they had come together, they asked Him, saying, "Lord, will You at this time restore the kingdom to Israel?"  
7And He said to them, "It is not for you to know times or seasons which the Father has put in His own authority.  

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who also said, "Men of Galilee, why do you stand gazing up into heaven? 

This same Jesus, who was taken up from you into heaven, will so come in like manner as you saw Him go into heaven."

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Then they returned to Jerusalem from the mount called Olivet, 

which is near Jerusalem, a Sabbath day's journey. 

---- The "when" of thing was not to be revealed to the Apostles.

That leaves open the possibility of this to be revealed at some future point in time to other believers.

---- The return of Christ will occur when He descends from heaven to the mount of Olivet

So, any other "claims" about His return can be proved False, if they do not occur in this manner and at this place.