About DaysOfTheWeek.org

Last reviewed on 2026-05-09

DaysOfTheWeek.org is a free educational reference dedicated to a single subject: the seven days of the week, across the languages, cultures, and writing systems where they are used. The aim is narrow on purpose. A reader who arrives looking for "Monday in Japanese" or "are days of the week capitalized in Spanish" should find a clear, accurate answer in seconds, with enough surrounding context to understand why the answer is what it is.

Who the site is for

The audience is broad but the use cases tend to repeat:

• Self-learners who are picking up a new language and need the days of the week early in their study.
• Travellers who want to read timetables, signs, and booking pages in the local language.
• School and homeschool parents teaching weekdays at primary level.
• Writers and editors checking grammar rules — capitalisation, articles, prepositions — in unfamiliar languages.
• Curious readers who want to know why English uses Norse god-names while Romance languages still wear their Roman planetary inheritance.

What the site covers

The site is organised around a small number of evergreen topics:

• Translations and pronunciation for weekday names in 16 languages, with audio recordings where they are available.
• Etymology — the origins of weekday names in English and across the Indo-European family, as well as the numbered systems used in Hebrew, Greek, Portuguese, and Mandarin.
• Grammar and capitalisation rules, which differ surprisingly between languages.
• Cultural context — why Friday is the weekend in much of the Muslim world, why Sunday is the first day of the week in some calendars and the seventh in others, and how these conventions show up in everyday writing.
• Practical tools: a day-of-week calculator that returns the weekday for any historical date in 16 languages, plus a short quiz.

How content is produced

Content is written and reviewed against general-knowledge sources — etymological dictionaries, language-reference works, and the published guidance of language academies. Translations and grammar notes are cross-checked against multiple references before publication. Where a claim is genuinely contested or varies by region, the site says so rather than picking a winner. The site does not publish original linguistic research; the value it adds is clarity, structure, and side-by-side comparison.

Pages are reviewed periodically and the "Last reviewed" line on each page reflects the most recent pass. If you spot an error, see the contact page.

Editorial principles

• No invented authority. The site does not attribute claims to fictional researchers, fabricated studies, or made-up experts. Where a stat is widely repeated but not cleanly sourced, it's framed as a rule of thumb rather than a fact.
• Plain language. Linguistic ideas are explained in everyday English, with technical terms only where they earn their place.
• Free and ad-supported. The site is free to read; running costs are covered by display advertising. See the privacy policy for details on how that is managed.

What the site is not

This is not a general translation dictionary, a calendar app, a horoscope service, or a religious-observance reference. It does not give medical, legal, financial, or astrological advice. Trivia about the days of the week (productivity patterns, travel pricing, cultural traditions) is published as light reading, not as guidance — see the disclaimer.

Get in touch

Corrections, missing language requests, accessibility issues, and partnership enquiries can be sent via the contact page.