Christian feast day: Johannes Bugenhagen (Lutheran)

Johannes Bugenhagen, also called Doctor Pomeranus by Martin Luther, was a German theologian and Lutheran priest who introduced the Protestant Reformation in the Duchy of Pomerania and Denmark in the 16th century. Contributions of Karlstadt and Luther to the translation of theology into social legislation were most fully realized by Bugenhagen. Among his major accomplishments was organization of Lutheran churches in Northern Germany and Scandinavia. He has also been called the "Second Apostle of the North".

Lutheranism is a major branch of Protestantism that emerged under the work of Martin Luther, the 16th-century German friar and reformer whose efforts to reform the theology and practices of the Catholic Church launched the Reformation in 1517. The Lutheran Churches adhere to the Bible and the Ecumenical Creeds, with Lutheran doctrine being explicated in the Book of Concord. Lutherans hold themselves to be in continuity with the apostolic church and affirm the writings of the Church Fathers and the first four ecumenical councils.