The Holy Innocents are the male children of Bethlehem and its surrounding district under the age of two, ordered killed by Herod the Great in his attempt to destroy the infant Christ — the episode recorded in Matthew 2:16–18. Herod, deceived by the failure of the Magi to return to Jerusalem and report the location of the new-born King they had been seeking, ordered the massacre on the basis of the Magi's information about the timing of the appearance of the Star.
The historical number of the Innocents has been variously estimated. The exaggerated medieval estimates (14,000 in the Byzantine, 144,000 in some Syrian traditions) reflect symbolic and liturgical considerations; modern historical estimates of the population of Bethlehem and its district at the time suggest a more sober number of perhaps 20–50 male infants killed. The chronology of the Massacre (within two years of the Magi's visit to Bethlehem) places the date roughly 4–2 BC.
They are venerated as the first martyrs of the Christian era — killed for Christ before they could profess Christ in words. Their feast on December 28 (the fourth day of the Christmas Octave) is part of the ancient cluster of December commemorations of the Nativity (Christmas Day, St. Stephen the Protomartyr on Dec 26, St. John the Evangelist on Dec 27, the Holy Innocents on Dec 28). In the modern Catholic Church the day has become a focus of pro-life devotion.

