Orthodox Easter Monday, also known as Bright Monday or Monday of Renewal, is observed in the Eastern Orthodox Church and the Catholic Churches of the Byzantine Rite. This holiday falls on the Monday following Easter Sunday, with the date varying based on the Julian calendar for Orthodox Christians and the Gregorian calendar for Catholics. The significance of Easter lies in the resurrection of Jesus Christ, which is celebrated with various customs and traditions. Although Easter Monday is the most important day in the Orthodox tradition, the celebration extends throughout the entire week, known as Bright Week. The calculation of Easter dates stems from the phases of the moon, leading to different observances between the two branches of Christianity. The celebration includes religious services and communal gatherings, reflecting the joy of the resurrection.