Christmas Eve in Eastern Christianity is observed worldwide on January 6, due to the use of the Julian calendar by many Oriental Orthodox and Eastern Orthodox churches, which is 13 days behind the Gregorian calendar. This day marks the conclusion of the 40-day Nativity Fast, a period that corresponds loosely with Advent in Western Christianity. Devout Christians often abstain from food until the first star appears in the evening sky, symbolizing the Star of Bethlehem. The liturgical celebrations include the Royal Hours, Divine Liturgy, and All-Night Vigil, with many returning home for a festive meal consisting of Lenten dishes, such as uzvar and kutia, which are traditional in Slavic countries. In Russia, Ukraine, and other regions, Christmas Eve also initiates the festive season known as Svyatki, which lasts until Epiphany and features customs like caroling, where singers visit homes to share songs and receive gifts.