Pope Anicetus

Pope Anicetus (ca. 155-166), was the tenth Pope of the Catholic Church, the official title is the Bishop of Rome. During his time as Pope, Rome became a center of Christian knowledge with the teachings of St. Hegesippus, St. Justin Martyr and St. Polycarp, a follower of St. John the Evangelist.
During his time as Pope, there were many discussions of when, exactly, the feast of the Resurrection (Easter) should be celebrated. This Pope favored the custom of celebrating Easter on a Sunday while others thought it should be celebrated on Passover, whatever day of the week that it should fall on. Anacetus's practice of celebrating Easter on Sunday was maintained while members of the Eastern Church favored Passover.
His feast day is celebrated on April 17.