Origins of the Days of the Week

Day (Old Norse) Meaning
Monday (Manisdagr) Moon's day
Tuesday (Tyrsdagr) Tyr's day
Wednesday (Odinsdagr) Odin's day
Thursday (Thorsdagr) Thor's day
Friday (Friggasdagr) Day of Frey/Freyja
Saturday (Laugardagr) Washing Day
Sunday (Sunnadagr) Sun's Day