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Origins of Weekday Names

Day Derivation
Sunday
First day of the week.
Derived from the Latin dies solis, "sun's day," a pagan Roman holiday.
Monday
Second day of the week.
Derived from the Anglo-Saxon monandaeg, which means "the moon's day." Latin: dies lunae, "day of the moon."
Tuesday
Third day of the week.
Named for the Norse god of war, Tiu, or Tyr, the son of Odin.
Wednesday
Fourth day of the week.
Named to honor Odin, or Woden, chief god in Norse mythology. Onsdag in Sweden and Denmark.
Thursday
Fifth day of the week.
Named for Thor, Norse god of thunder. Torsdag in Sweden and Denmark.
Friday
Sixth day of the week.
Named for the Norse goddess of love, Frigg, or Frija. Variation of the Old High German frìatag, "day of Frija."
Saturday
Seventh day of the week.
Named in honor of the Roman god Saturn. Latin: Saturni.
Sater-daeg
by the Anglo-Saxons.