AH! My mistake. It's the previous verse.
Act 1:7 "It is not for you to know times or seasons which the Father has fixed by his own authority."
You disagree with at least 90% of legitimate Bible commentators. (Not to be confused with armchair, self-anointed, Bible geniuses) Where do you get this nonsense?
Acts 1:6 When they therefore were come together, they asked of him, saying, Lord, wilt thou at this time restore again the kingdom to Israel? 7 And he said unto them, It is not for you to know the times or the seasons, which the Father hath put in his own power.
Matthew 24:32 Now learn a parable of the fig tree; When his branch is yet tender, and putteth forth leaves, ye know that summer is nigh: 33 So likewise ye, when ye shall see all these things, know that it is near, even at the doors. 34 Verily I say unto you, This generation shall not pass, till all these things be fulfilled. 35 Heaven and earth shall pass away, but my words shall not pass away. 36 But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only. 37 But as the days of Noe were, so shall also the coming of the Son of man be.
The above verses speaks about how man is always looking for signs of the return of Jesus, but Jesus said that no man, but only the Father knows when Jesus will return in Gods perfect timing and season.
Rev 1:11 Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea.
Nope, don't see anything here that says only seven letters were sent to the seven Churches, but that John is to send them what he sees as he writes these visions in a book and sends them to the seven Churches in Asia.