context: Saint Ambrosius (ca. 340 - April 4, 397) was the bishop of Milan and one of the most prominent churches of the Christian Church in the 300th century. He is respected in Catholicism, Orthodoxy, Anglicanism and Lutheranism. Together with Augustine, Hieronymus, and Gregory the Great, he is counted as one of the four pastoral teachers of the Catholic Church. The bishop is a patron saint of bees, candle makers, livestock, geese, Milan, police and students. His celebration will be celebrated on December 7. According to the saint, the Basilica of Basilica di Sant'Ambrogio in Milan, originally built between 379 and 386, and the Church of Sant'Ambrogio in Florence, were originally named. St. Ambrosius is also known as the baptist of St. Augustine.
question: When is St. Ambrosius Day celebrated?
answers.text: December 7