That's why, as we begin another liturgical year, the Church directs our attention to the conclusion toward which we are headed, the ending that God had in mind when He began to implement the plan of our salvation. One of the purposes of the Church's liturgical year is to keep us aware that God works in time, that God is involved with the passage of one year into another.
Every year involves beginning again and repeating the same events and seasons.
Each year constitutes a cycle. But God's fundamental involvement in time is linear, that is, it moves in one direction only, forward to the final stage of His plans for us and our world. God is not forever beginning over, starting new projects, rejecting what He had been involved in before. No, there is one plan for salvation, an unchanging one that starts at a definite beginning and is directed toward a definite end. That's part of what we recall when we come to the end of one year and launch into another.