A Week Named by the Gods

Seven Divine Days

Have you ever stopped to think about why we call the days of the week by the names we do? Well, every time you say “Tuesday” or “Thursday,” you’re echoing the names of ancient gods and goddesses! The days of the week are one of the most everyday reminders that classical mythology is still woven into our modern lives.
Here’s the short story of how it happened—and which deities you meet when you check the calendar.

From the Sky to the Calendar

Ancient astronomers (especially the Babylonians) noticed seven bright “wandering” lights in the sky that moved differently from the fixed stars: the Sun, the Moon, and the five planets visible to the naked eye (Mercury, Venus, Mars, Jupiter, and Saturn). They organised time around these seven bodies.

The Romans later named the days of the week after the same celestial bodies and the gods linked to them:

dies Solis (Sun’s day)
dies Lunae (Moon’s day)
dies Martis (Mars’s day)
dies Mercurii (Mercury’s day)
dies Iovis (Jupiter’s/Jove’s day)
dies Veneris (Venus’s day)
dies Saturni (Saturn’s day)

When Germanic and Anglo-Saxon peoples adopted the seven-day week, they kept the system but swapped in their own gods who shared similar roles or qualities. That’s why English (and related languages) ended up with a fascinating mix of Roman planetary names and Norse/Germanic deities.

A Day-by-Day Tour of the Gods

Sunday – Sun’s Day
Named for the Sun itself. In Latin it was dies Solis. Germanic peoples kept the idea, calling it Sunnandæg. In Norse mythology, the sun is personified as the goddess Sól (or Sunna), who drives a chariot across the sky. Many cultures have celebrated solar deities—think of the Roman Sol or the Egyptian Ra.

Monday – Moon’s Day
From Old English Mōnandæg, a direct translation of the Latin dies Lunae. The moon was associated with the Roman goddess Luna (and the Greek Selene). In Norse tradition the moon is personified as Máni, Sól’s brother.

Tuesday – Týr’s (Tiw’s) Day
The Romans called it Mars’s day after their god of war. The Germanic peoples matched Mars with their own war and justice god, Týr (Old English Tīw or Tiu). Týr is famous for the brave sacrifice of his hand to bind the great wolf Fenrir. So Tuesday is literally “Tiw’s day.”

Wednesday – Woden’s (Odin’s) Day
Roman Mercury’s day became Woden’s (or Odin’s) day. Odin, the Allfather of the Norse gods, was linked with Mercury because both were associated with wisdom, travel, eloquence, magic, and guiding souls. The spelling of “Wednesday” still hides the old form Wōdnesdæg.

Thursday – Thor’s Day
Jupiter (Jove), the Roman king of the gods and god of thunder and the sky, was matched with the mighty Norse thunder god Thor (Old English Thunor). Both wield thunderbolts or hammers and protect the world. Thursday comes from Þūnresdæg — “Thunder’s day” or “Thor’s day.”

Friday – Frigg’s (or Freya’s) Day
Venus, the Roman goddess of love, beauty, and fertility, was paired with the Germanic goddess Frigg (wife of Odin). The day is called Frigedæg in Old English. Romance languages keep the Venus connection more clearly (vendredi, viernes, venerdì).

Saturday – Saturn’s Day
This one stayed closest to the Roman original. It is named after Saturn, the ancient Roman god of agriculture, time, and the golden age. While some other Germanic languages developed different names (such as a “bath day” or washing day), English kept the link to Saturn.

Mythology Is All Around Us

The next time your little one asks what day it is, you have a ready-made mythology lesson! Four of the days (Tuesday through Friday) still carry the names of Norse gods that appear in our Norse Gods book. Sunday, Monday, and Saturday connect to the broader classical tradition you’ll find in Gods of Rome and Gods of Greece. Even the structure of the week itself comes from the same sky-watching that inspired so many ancient stories.

Classical mythology isn’t locked away in old books or museums. It lives in the words we use every single day. Exploring these connections is a wonderful way to spark curiosity in young readers and to show them that the gods and goddesses of the past are still part of the world they live in.

If you’d like to meet Thor, Odin, Týr, Frigg, Mars, Jupiter, Venus, Saturn and many more in child-friendly illustrated form, take a look at the Little Pantheons series. The gods have been expecting you…