(Sorry for being so late in posting this.)
Some people think that re-reading a novel is pointless, since you already know the ending. But some novels are so well written that part of the joy and profit in reading them is to watch the story go by again, to get to know the characters better, to relish the insights the author has in what it means to be human.
We revisit Good Friday each year for similar reasons. We know that Easter is coming, but want and need to see the day of crucifixion again, to understand it better, and to be shaped by it. We mustn’t undercut the seriousness or darkness of the day. But neither can we understand the day if we try to see it apart from the resurrection.