Easter is not a single day; it is a season that lasts until Pentecost. . . . Easter is the source event of all the events of the Christian year. It is like the neck of the hourglass. Every event of the Christian year flows into Easter, even as all the events of the Christian year flow from Easter.
-Robert Webber, Ancient-Future Time: Forming Spirituality through the Christian Year (Grand Rapids: Baker Books, 2004), 142-143.