Many Christian communities around the world annually observe the Feast of the Immaculate Conception on December 8. This day is a holy day of obligation in which many Christians, particularly of the Catholic faith, attend special church services for this occasion. The feast focuses on the concept that the Virgin Mary was conceived without sin. There are two mistakes that people often make about the Immaculate Conception. The first is that many people confuse the concept with the belief that Mary gave birth to Jesus while remaining a virgin. The second mistake is that some people believe that Mary was conceived without sexual intercourse.