Transfiguration Sunday is a significant date in the Christian liturgical calendar, observed on the Sunday immediately preceding Ash Wednesday. This observance commemorates the Transfiguration of Jesus, an event recounted in the New Testament where Jesus is transfigured and becomes radiant in glory upon a mountain. The event is witnessed by three of his apostles: Peter, James, and John.
The importance of this day lies in its thematic connection to the Lenten season, which begins shortly thereafter. It serves as a final glimpse of glory and celebration before the somber and reflective period of Lent. Historically, churches have used this Sunday to emphasize the divinity of Jesus and to prepare congregants for the sacrifices and introspection expected during Lent.