Martinisingen (pronounced Martini-zingen; literally "Martin singing" i.e. "St. Martin Song") is an old Protestant custom which is found especially in East Friesland, but also on the Lüneburg Heath and in other parts of Northern and Eastern Germany. It also goes under the names of Martini or Martinssingen and the Low German names of Sünnematten or Mattenherrn (today often erroneously corrupted to Matten Matten Mähren). Martinisingen takes place on 10 November (similar to the Catholic Martinssingen on 11 November) with groups of people carrying their lanterns from house to house and singing traditional songs.