Is there another reason why the Lord would tell us we will not know the day or hour? Yes. How about conflicting counts of time. What does that mean? It means if the calendars, the observances of the Lord's feast days are not being observed on the actual appointed days according to the Lord's count of time, we could and likely will stumble into the Divine appointed time/feast without consciously knowing it because of the corruption of calendars and or appointed time start and end dates.
In His mercy and grace, the Lord gave us the remedy for what He knew we would be facing in His simple command to be constantly watching for His return.
Matt 25:1Then shall the kingdom of heaven be likened unto ten virgins, which took their lamps, and went forth to meet the bridegroom. 2And five of them were wise, and five were foolish. 3They that were foolish took their lamps, and took no oil with them: 4But the wise took oil in their vessels with their lamps. 5While the bridegroom tarried, they all slumbered and slept. 6And at midnight there was a cry made, Behold, the bridegroom cometh; go ye out to meet him. 7Then all those virgins arose, and trimmed their lamps. 8And the foolish said unto the wise, Give us of your oil; for our lamps are gone out. 9But the wise answered, saying, Not so; lest there be not enough for us and you: but go ye rather to them that sell, and buy for yourselves. 10And while they went to buy, the bridegroom came; and they that were ready went in with him to the marriage: and the door was shut. 11Afterward came also the other virgins, saying, Lord, Lord, open to us. 12But he answered and said, Verily I say unto you, I know you not. 13 Watch therefore, for ye know neither the day nor the hour wherein the Son of man cometh.
He knew there would be confusion and He knew there would be corruption. He gave us the solution-always be watching for His unexpected return. Our God is very great.
grace and peace