Tuesday, September 23, 2025

How did different cultures influence the naming of the days of the week in English



The names of the days of the week in English reveal a rich interplay of cultural influences, primarily from Roman and Germanic (including Norse) traditions, with some vestiges of ancient astrological practices.[1][2][3]

Roman and Planetary Influence

  • The seven-day week became widespread due to Roman adoption, naming days after the Sun, Moon, and five visible planets, each associated with a Roman deity: Sol (Sun), Luna (Moon), Mars, Mercury, Jupiter, Venus, and Saturn.[1][2][3]
  • In Latin, weekdays were called dies Solis (Sunday), dies Lunae (Monday), dies Martis (Tuesday), dies Mercurii (Wednesday), dies Jovis (Thursday), dies Veneris (Friday), and dies Saturni (Saturday).[3]

Germanic and Norse Substitution

  • As the Germanic tribes adopted the Roman calendar, they replaced Roman gods with their own deities that matched the characteristics of the originals, especially for Tuesday through Friday.[1][2][3]
  • For example, Mars (the war god) became Tiw or Tyr (Norse warrior god) for Tuesday; Mercury (messenger, god of wisdom and magic) corresponded to Woden/Odin for Wednesday; Jupiter (thunder god) was equated to Thor for Thursday; Venus (love goddess) became Frigg or Freyja for Friday.[4][2][1]

English Weekday Names Breakdown

Day

Roman Origin

English Name Source

Details

Sunday

Sun (Solis)

Sun

Retains ancient/Latin celestial name

Monday

Moon (Lunae)

Moon

Retains ancient/Latin celestial name

Tuesday

Mars (Martis)

Tiw/Tyr

Germanic/Norse god of war

Wednesday

Mercury (Mercurii)

Woden/Odin

Germanic/Norse all-father god

Thursday

Jupiter (Jovis)

Thor

Norse thunder god

Friday

Venus (Veneris)

Frigg/Freyja

Norse goddess of love & beauty

Saturday

Saturn (Saturni)

Saturn

Retains original Roman god's name


Cultural Mixing and Modern Legacy

  • Sunday and Monday closely reflect original Roman/Latin celestial associations, as do Saturday, which directly preserves the Roman god Saturn's name.[1][3]
  • Tuesday through Friday demonstrate the deep embedding of Norse and broader Germanic mythology in the English calendar system, a legacy remaining visible in today’s language.[4][2][1]

The naming of the days in English thus represents a remarkable cultural fusion: Roman conventions were adapted and partly overwritten by the dominant Germanic and Norse mythological frameworks in the early medieval period, producing the hybrid system familiar today.

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  • https://englishlive.ef.com/en/blog/language-lab/origins-behind-english-weekday-names/      
  • https://worldwideinterpreters.com.au/2023/05/14/names-of-the-days-of-the-week/     
  • https://altalang.com/beyond-words/days-of-the-week-word-origins/     
  • https://www.vikingeskibsmuseet.dk/en/professions/education/viking-age-people/the-names-of-the-weekdays  
  • https://en.wikipedia.org/wiki/Names_of_the_days_of_the_week 
  • https://www.pearson.com/languages/community/blogs/english-days-of-the-week-9-24.html 
  • https://www.norhalla.com/blogs/tidbits-from-norse-mythology-and-viking-lore/norse-gods-are-days-of-the-week 
  • https://www.britannica.com/science/week 
  • https://www.ltes-global.com/a-day-by-any-other-name/ 

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