Anglo-Saxon mythology
The Germanic gods have affected elements of every day western life in most countries that speak Germanic languages. An example is some of the names of the days of the week. The names for Tuesday through Friday are named after Germanic gods. In English and Dutch, Saturday was named after the Roman god Saturn. This is because the 7-day week was invented by the Romans which ultimately shaped the calendar we use today and the English and the Dutch never substituted a god’s name for this day. Saturday is named after the Sabbath in German, and is called "washing day" in Scandinavia. Sunday and Monday are named after the Sun (or Sunne in Old English) and the Moon (Mōna in Old English).