In the ancient world the first day of the week was Sunday. The Romans named their days after the sun, moon and planets, and put them in the order in which they believed they were distanced from earth: sun, moon, Mars, Mercury, Jupiter, Venus and Saturn.
After the Roman conquest, the Britons adopted this way of naming the days. Sometimes they stuck to the Roman names. Sometimes they used the names of their own gods. So the days of the week as we name them are a hotchpotch of both.
In Anglo-Saxon times Sunday was Sunnendaeg the day of the sun. Monday was Monandaeg – the day of the moon. Tuesday was Tyrdaed – the day of Tyr (also called Tiu or Tiw), son of Odin and brother of Thor. Wednesday was Wodensdaeg – the day of Woden or Odin (god of wisdom, poetry, war and agriculture). Thursday was named Thor daeg after Thor, the god of thunder. Friday was Frigedaeg the day of Frigg or Freyja, the goddess of love and wife of Odin. And Saturday was Saeterdaeg the day of Saturn, the Roman god of seedtime and harvest.
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