The Christian year, sometimes called the church year or the liturgical year, is a centuries-old way that many Christians have ordered the 365-day year. It depends, not on the positions of the sun and moon, nor on the start and end of school, nor on the requirements of the IRS, but rather on key aspects of the life of Christ that are coordinated with the solar calendar. The major holidays (literally, holy days) in the church year are Christmas, Good Friday, Easter, and Pentecost. Other special days or seasons represented in the calendar are Advent, Epiphany, Ash Wednesday, Lent, Palm Sunday, Holy Week, Maundy Thursday, etc. At Green Hill the changing of the seasons is represented visually by the changing of the colors of the paraments on the pulpit and Communion table.