Christmas Eve, also known as Christmas Vigil, is observed around the world in different ways. 5 ways it’s observed:1) Many denominations celebrate the birth of Jesus on Christmas Eve, due to the Gospel of Luke account that takes place at night. 2) Roman Catholics and high church Anglicans celebrate Midnight Mass at or just before midnight on Christmas Eve for the same reason. It is particularly popular in Poland, which calls it pasterka. 3) Lutherans practice Christmas Eve Eucharistic traditions, which include “Krippenspiele” (Nativity plays). 4) In the Byzantine Rite, Christmas Eve is referred to as Paramony (“preparation”). It is the concluding day of the Nativity Fast a day of strict fasting.5) The Feast of the Seven Fishes is an Italian-American Christmas Eve tradition, with seafood served as a substitute for meat.