The Etymology of the Weekdays

"Venus and Mars" Created by Palma il Giovane c. 1605-1609 | Courtesy Getty Gateway Images

While it may not seem all that important at first glance to learn about how the days of the week got their names, it is actually very important from a cultural perspective. As many of the weekdays are named after the gods of various religions, we can learn much about the religious practices of certain cultures by analyzing why and how certain gods and goddesses were associated with certain days. Religion and culture are closely intertwined to the point where the English words culture and cult are derived from the same word. Studying a culture’s religion can provide insight into how inhabitants of that culture thought and how they viewed the world.

The word Sunday is, appropriately enough, named after the sun. 1 Specifically, it is derived from the Old English word sunnandæg. Sunnandæg itself is the combination of two words, sunnen,  which means “sun,” and dæg, which means “day.”2

The word Monday is derived from the Old English word monandæg, which combines two other Old English words: mona, which means “moon,” and dæg, which, as mentioned above, means “day.” In this respect, Monday is much like the word Sunday in that Monday references the moon whereas Sunday references the sun.3

The word Tuesday is derived from the word Tysdagr, which references the god Tyr.  Tyr, also rendered as Tiw or Tiu, is the Norse god of war and justice. The words for Tuesday in other languages also reference other gods of war from various mythologies. For example, in Latin, the word for Tuesday is dies Martis, which means “day of Mars.” Mars is Tyr’s counterpart in the Roman pantheon, being the god of war for the Romans, as well as “protector of Rome.” 4

Wednesday is derived from the Old English word wodnesdæg, referencing the god Woden.5 Woden is also known as Wodan and Wotan, but he is most commonly known by the name of Odin. Due to the multiple different “archaeological and literary sources” surrounding Odin, it is hard to tell what “his exact nature and role” was in the Norse pantheon, though much like Tyr, he is a god of war and poets, as well as the “protector of heroes.” He is commonly depicted as a one-eyed elderly man with “a flowing beard.” In Latin, the name for Wednesday is dies Mercurii, referencing the Roman god Mercury, who Odin was identified as by the Roman historian Tacitus.6 Mercury, also known as Mercurius, is the Roman “god of shopkeepers and merchants, travelers and transporters of goods, and thieves and tricksters.” He is often considered the Roman counterpart to the Greek god Hermes and both have a role as messenger within their respective pantheons.7

Thursday is derived from “Thor’s-day,” referencing the name of Thor, Norse god of thunder.8 Thor is commonly depicted in Norse mythology as an extremely strong, red-haired, “great warrior,” and the son of Odin in some traditions. He possessed a magical hammer named Mjollnir and is fated to die while killing “the world serpent Jormangund” during the Ragnarok, the destruction of the “world of gods and men” in Norse mythology. The Latin term for Thursday is dies Jovis, which means “Jove’s day” and references Jupiter/Jove, the head Roman god that “Thor was sometimes equated with.”9

"Jupiter" originates from France c. 1670 or 1680-1700 |Courtesy Getty Gateway Images
“Jupiter” sculpture from France
c. 1670 or 1680-1700 | Courtesy Getty Gateway Images

The word Friday is derived from “Frigg’s-day,” which references the name of the Norse goddess Frigg, also known as Freya, Frea, or Friia. Frigg is Odin’s wife and patron of love, specifically “marriage and fertility.”10

The word Saturday is derived from the Middle English word saterday and the Old English word sæterndæg, the latter referencing Saturn of Roman mythology. Saturn, also called Saturnus in Latin, was the Roman god of “sowing and seed.” He is also identified as Cronus, one of the Greek Titans and father of Zeus. Zeus drove Saturn/Cronus out of Mount Olympus, but Saturn is also said to have given “his people agriculture and other peaceful arts” and “ruled Latium” during a peaceful and prosperous “golden age.”11

Even today, religion has an effect on our culture. Whether it is through our overall sense of morals or through the expressions and idioms we use, religion and religious practice often affect how we think, even if we are not consciously aware of it. How much more would religion have affected older cultures, many of whom were more openly pious than ours? As American culture puts an emphasis on multiculturalism, it is colored by other cultures and often takes aspects of them into itself. Therefore, through understanding other cultures, we can learn more about our own.

  1. Encyclopedia Britannica, 2016, s.v., “Week.”
  2. “Sunday | Definition of Sunday by Merriam-Webster,” Merriam-Webster, accessed November 18, 2016,
  3. “Monday | Definition of Monday by Merriam-Webster,” accessed November 18, 2016,
  4. Encyclopedia Britannica, 2016, s.v., “Tyr.”
  5. “Wednesday | Definition of Wednesday by Merriam-Webster,” Merriam-Webster, accessed November 18, 2016,
  6.  Encyclopedia Britannica, 2016, s.v.,“Odin.”
  7. Encyclopedia Britannica, 2016, s.v.,“Mercury.”
  8. Encyclopedia Britannica, 2016, s.v.,“Week.”
  9. Encyclopedia Britannica, 2016, s.v., “Thor.”
  10. Encyclopedia Britannica, 2016, s.v., “Frigg.”
  11. Encyclopedia Britannica, 2016, s.v., “Saturn.”
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  • I had never thought about the origins of the names of the week. I never expected the names to derive from so many different civilizations. Though it is easy to remember that things such as our justice system and moral ideas come from ancient civilizations we forget how their culture affects our everyday life in simple things like the days of the week.

  • This was a very interesting article on the etymology of the days of the week. I did not know that most days in the weeks are influenced by the Norse gods. Religion affects our culture, and it is great to see how different religions significantly influenced the days of the week. Overall, this was a great article that described the etymology of the days of the week.

  • Very informative article on the cultural perspective of the days of the week. I never knew the cultural aspect behind the days of the week, therefore the article provides a good account on the old English, norse, and roman culture the days of the week encompass. I like how the article provides a background into the Gods named for each day of the week. I have always taken a particular interest in the mythology of Gods.

  • Great to see an article that can very well be used in our everyday lives. Well it is used but now knowing how the words were derived it is something that I am happy to be made aware of. Expanding our knowledge is something we should all be actively pursuing, and reading this article did just that.

  • It is important to learn about how the days of the week got their names from a cultural perspective. I love the cute detail about the contrast between Monday and Sunday named after the moon and the sun, respectively, unlike the other days of the week that were named after Gods. We clearly see that religion had a big impact on the English language and how they were named, and we can also have compared how they change language from language.

  • This is a very fascinating article. I use the names of the days whenever I plan out events, schedule appointments, and when keeping up with my agenda. However, I never questioned where these names come from. This article did precisely that. When reading along, I noticed that most of the names originated from gods and goddesses which was something I would not have otherwise learned. Overall, a very straightforward and informative article!

  • This article was the most interesting I have read so far. Some of the days, I already knew where they were derived from, such as Sunday and Monday, but the others, I had no clue how they were named. Many of them, of course, I thought of the Marvel movies of Thor, but I also like how many of the days were from Latin origins, Roman origins and Greek origins but they all relate to each other either way.

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