when observed, is the first service of Easter Day, and dates from the earliest days of the Church. It is celebrated at a convenient time between sunset on Holy Saturday and sunrise on Easter Morning.
The service normally consists of four parts:
1. The Service of Light.
2. The Service of Lessons.
3. Christian Initiation, or the Renewal of Baptismal Vows.
4. The Holy Eucharist with the administration of Easter Communion.