It could happen next week--or on October 13, AD 999,999,999, or in between, or later.
"Therefore be ye also ready: for in such an hour as ye think not the Son of man cometh.Who then is a faithful and wise servant, whom his lord hath made ruler over his household, to give them meat in due season? Blessed is that servant, whom his lord when he cometh shall find so doing" (Mat 24:44-46) Obviously the season Jesus is talking about is the one when He will appear.He says the servant giving spiritual food in due season will be blessed.Therefore He is telling us that that when He comes,blessed is that servant telling believers "He's coming".So yes it obviously matters a great deal.The fact that around a third of the Bible has to do with the prophetic should tell us that loud and clear.
2 Tim 1:7,8) For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind.Be not thou therefore ashamed of the testimony of our Lord...for the testimony of Jesus is the spirit of prophecy.(Rev 19:10)
Mark 13:37 And what I say unto you I say unto all, Watch