How would you react if a ban were placed on the celebration of Christmas? Many Christians are reluctant to celebrate other holy days from the Christian church year; seasons like Advent, Epiphany, Pentecost, and Lent seem to have a Roman Catholic or Episcopalian aura about them. This article wants to cut through some of the mystery about these seasons. It traces the development of the Christian church year from its origins in Old Testament worship and indicates how our current Christian holy days are related to Old Testament worship and grew in the early church. In this way, Christians can be helped to understand the pattern of these days and seasons and can make the celebration of them more meaningful.