DAYS OF THE WEEK
Origin of The Names For The Days of The Week
The names of the days are in some cases derived from Teutonic deities or, such as in Romance languages, from Roman deities. The early Romans, around the first century, used Saturday as the first day of the week. As the worshipping of the Sun increased, the Sun's day (Sunday) advanced from position of the second day to the first day of the week (and Saturday became the seventh day).
The name comes from the Latin dies solis, meaning "sun's day": the name of a pagan Roman holiday. It is also called Dominica (Latin), the Day of God. The Romance languages, languages derived from the ancient Latin language (such as French, Spanish, and Italian), retain the root.
The name comes from the Anglo-Saxon monandaeg, "the moon's day". This second day was sacred to the goddess of the moon.
This day was named after the Norse god Tyr. The Romans named this day after their war-god Mars: dies Martis.
The day named to honor Wodan (Odin). The Romans called it dies Mercurii, after their god Mercury.
The day named after the Norse god Thor. In the Norse languages this day is called Torsdag. The Romans named this day dies Jovis ("Jove's Day"), after Jove or Jupiter, their most important god.
The day in honor of the Norse goddess Frigg. In Old High German this day was called frigedag. To the Romans this day was sacred to the goddess Venus, and was known as dies veneris.
This day was called dies Saturni, "Saturn's Day", by the ancient Romans in honor of Saturn. In Anglo-Saxon: sater daeg.
~Justin Taylor, ORDM., OCP., DM.