According to the Book of Revelation and the revelations given to the Prophet Joseph Smith, we know that we are in the end times. Here is a part of a revelation given to the Prophet Joseph Smith concerning the temporal existence of this earth:
Doctrine and Covenants 77:6-7
6 Q. What are we to understand by the book which John saw, which was sealed on the back with seven seals? A. We are to understand that it contains the revealed will, mysteries, and the works of God; the hidden things of his economy concerning this earth during the seven thousand years of its continuance, or its temporal existence.
7 Q. What are we to understand by the seven seals with which it was sealed? A. We are to understand that the first seal contains the things of the first thousand years, and the second also of the second thousand years, and so on until the seventh.
The temporal existence of this earth is the time from the fall of Adam and Eve until the end of Christ's millennial reign on earth. The Book which John saw that was sealed with seven seals is mentioned in the The Book of Revelation chapter 5. Each of the seals represents a thousand year period of this earth's temporal existence. The first seal represents the first thousand years, the second seal represents the second thousand years and so on through the 7th seal. The seventh seal represents the final thousand year period with includes Christ's second coming and millennial reign on the earth. LDS scripture speak of Christ coming his second time after the opening of the seventh seal. The Book of Revelation chapter 8 speaks of the opening of the seventh seal and the events that lead up to Christ second coming.
My personal belief is that Christ came in the middle time or meridian of time which I believe was the 4th seal or the end of the 4th thousand year period of this earth's temporal existence. I believe most of his Apostles were killed during the opening of the 5th seal. If Christ died and was resurrected in the year 33 A.D., then that would have been the end of the 4th seal. This would mean that the end of the 5th seal would have occurred in 1033 A.D. and the 6th seal would have to end in the year 2033 A.D. So I believe we are in the last years of the 6th seal and in about 8 years from now the seventh seal will open. Read the Book of Revelation chapter 8 for the events that occur after the opening of the seventh seal. There is quit a list of things that are to occur before Jesus makes his second coming appearance on the earth again. These are my beliefs about the end times.