Personent Hodie, popularly known as On this day earth shall ring, is a delightful fourteenth-century German Christmas carol celebrating Jesus' birth. It is part of the Piae Cantiones (devotional songs) collection where Theodoricus Petrus of Nyland, Finland, compiled songs while he was a student in Rostock in 1582. Many of these songs were later published by Neale and Helmore of England in 1853.