Why are English days named what they are?

Charlotte Guest
Charlotte Guest
Two friends stood over a book in a library reading it and smiling
Reading time: 4 minutes

Ever wondered why Monday is called Monday or how Wednesday got its name? The names of the days of the week in English have fascinating origins, rooted in ancient history and steeped in mythology. Understanding these origins not only enriches our language ability but also provides intriguing insights into cultural heritage.

Origins of the days of the weeks names
Play
Privacy and cookies

By watching, you agree Pearson can share your viewership data for marketing and analytics for one year, revocable by deleting your cookies.

Origins of the seven-day week

The concept of a seven-day week has ancient origins, tracing back to the Babylonians around 1500 BCE. The Babylonians, keen astronomers, divided their lunar cycle into four weeks of seven days each, aligning with the phases of the moon. This practice was later adopted by the ancient Greeks and Romans, who found the seven-day cycle practical and meaningful.

The ancient Hebrews' influence also played a crucial role in establishing the seven-day week. According to the biblical account of creation, God created the world in six days and rested on the seventh, establishing a divine precedent for a seven-day cycle. This tradition was deeply ingrained in Hebrew culture and religious practices.

By the 1st century CE, the Romans had formalized the seven-day week, integrating it into their calendar system. This structure, combining astronomical observations and religious traditions, eventually spread throughout the Roman Empire and beyond, becoming the foundation of the modern seven-day week we use today.

In the Arabic and Hebrew calendars, the day begins at sunset, which contrasts with the Swahili concept of the day starting at sunrise and the Western world, where the day starts at midnight. This highlights the cultural influences on how days are numbered and identified within these different calendrical systems.

Origins of days of the week

How did Monday get its name? Meaning of Monday

Monday is named after the Moon. The Old English word for Monday was Monandæg, which translates to "Moon's day". This naming convention is quite common across various languages; for instance, in Latin, it's dies Lunae, also meaning "day of the Moon".  

Tuesday name origin

Tuesday is named after the Norse god Tiw (also known as Tyr), a god of war and sky. The Old English term Tiwesdæg directly reflects this association. The connection to Mars, the Roman god of war, can also be seen in other languages, such as French (mardi).

Why is Wednesday called Wednesday?

Wednesday is named after Odin (or Woden), the chief god in Norse mythology. The Old English Wodnesdæg translates to "Woden's day". This day is associated with Mercury in Roman mythology, which is why it's called miércoles in Spanish and mercredi in French.

Thursday name meaning

Thursday is named in honor of Thor, the Norse god of thunder. The term 'Thor's day' serves as the etymological basis for Thursday. In Old English, it was Þūnresdæg (Thunor’s day). The link to Jupiter, the Roman king of gods and god of thunder, explains the name jeudi in French and jueves in Spanish.

Friday history and meaning

Friday is named after Frigg (also known as Frigga or Freya), the Norse goddess associated with love and beauty. The Old English term Frigedæg means "Frigg's day". In Roman mythology, this day is linked to Venus, the goddess of love, which is reflected in names like viernes in Spanish and vendredi in French.

Saturday name origin

Saturday is unique among the English day names as it retains its Roman origin, specifically named after the Roman god Saturn, the Roman god of wealth and time. The Old English Sæternesdæg directly references this deity. Interestingly, in other Germanic languages, the name often refers to the Sabbath, such as Samstag in German.

Sunday - The sun's day

Sunday is named after the Sun. Icelandic uniquely retains 'only the Sun' as the name for Sunday, rejecting names derived from pagan gods. The Old English Sunnandæg translates to “Sun’s day”, reflecting its importance and reverence in various cultures. This name is consistent across many languages, highlighting the widespread significance of the Sun.

The importance of understanding day names etymology

Understanding the etymology of day names helps language learners grasp the historical context and deepens their appreciation of English. These names are more than just labels for days; they are windows into ancient beliefs, cultures and linguistic evolution. The influence of Greek and Latin names on the naming of the days of the week during the Greco-Roman tradition is particularly notable, as the classical planets from Hellenistic astrology played a significant role in this process.

Exploring the origins of the day names in English reveals a blend of mythology, history and language evolution. From the Moon to Norse gods to Roman deities, each name tells a story of cultural significance.

More blogs from Pearson

  • A teachr standing by students in a classroom holding a tablet up
    Assessment Evolved ELT edition: Supporting English language assessment in the age of GenAI
    By Mike Mayor
    Reading time: 3 minutes

    The conversation around generative AI in education has moved quickly.

    For English language teachers, though, the reality in classrooms has often felt more complicated than the headlines suggest.

    AI tools are already being used by students. Teachers are trying to understand where these tools help, where they create challenges and what this means for learning moving forward.

    One thing educators continue to raise is the need for practical support. Not just discussions about AI itself, but guidance that connects to real classroom experiences and day-to-day teaching.

    That is part of the reason behind the ELT Edition of Assessment Evolved: Formative Assessment in a Generative AI Era.

  • Two business people working together on a tablet
    How to politely say no in business English
    By Charlotte Guest
    Reading time: 3 minutes

    Knowing how to say “no” politely is an important communication skill in the workplace. Whether you are declining a meeting, turning down a request or rejecting a business proposal, the way you respond can affect professional relationships.

    For English learners, saying no can feel especially difficult. Many people worry about sounding rude, unhelpful or unfriendly. The good news is that Business English includes many polite and professional phrases that help you refuse requests clearly while still showing respect.

    Here are five useful ways to politely say no in Business English, with examples and tips for when to use them.

    1. “Thank you for considering me, but I must respectfully decline.”

    This phrase is polite, professional and direct. It shows appreciation for the opportunity while making your decision clear.

    When to use it

    • Declining a job offer
    • Turning down a business proposal
    • Refusing a formal invitation

    Example

    “Thank you for considering me, but I must respectfully decline the offer at this time.”

    Why it works

    This phrase sounds professional because it:

    • Starts with appreciation
    • Communicates your answer clearly
    • Maintains a respectful tone

    2. “I appreciate your interest but, unfortunately, I’m unable to commit at this time.”

    This expression is useful when you cannot accept something because of time, workload or other responsibilities.

    When to use it

    • Declining extra work
    • Saying no to projects
    • Refusing invitations professionally

    Example

    “I appreciate your interest but, unfortunately, I’m unable to commit at this time due to other priorities.”

    Why it works

    This phrase helps soften the refusal and explains that your decision is based on circumstances rather than the person themselves.

    3. “I understand where you’re coming from, but I don’t think it’s the right fit for me.”

    This is a good phrase for situations where you want to disagree politely or decline an offer that does not meet your needs.

    When to use it

    • Declining a service or product
    • Rejecting a business idea
    • Turning down partnerships

    Example

    “I understand where you’re coming from, but I don’t think it’s the right fit for our team right now.”

    Why it works

    The phrase shows empathy first before giving your opinion. This helps keep the conversation positive and respectful.

    4. “Thank you for the opportunity, but I’m afraid it’s not something I can take on right now.”

    This phrase is useful when you may be interested in the future, but cannot accept now.

    When to use it

    • Declining freelance work
    • Refusing additional responsibilities
    • Saying no to speaking events or collaborations

    Example

    “Thank you for the opportunity, but I’m afraid it’s not something I can take on right now.”

    Why it works

    This response sounds polite and professional without completely closing the door to future opportunities.

    5. “Thank you for thinking of me, but I won’t be able to.”

    This is a shorter and more informal way to politely say no.

    When to use it

    • Declining small requests
    • Saying no to casual invitations
    • Refusing minor tasks

    Example

    “Thank you for thinking of me, but I won’t be able to attend the meeting tomorrow.”

    Why it works

    It is simple, clear and friendly. However, it works best in less formal business situations.

  • Students studying together at a table
    What students wish they’d done earlier when planning to study in the USA
    By Abi Fordham
    Reading time: 2 minutes

    If you spend enough time reading student forums, Reddit threads or comment sections about studying in the USA, you begin to notice a pattern.

    There’s plenty of advice about what students should do next. But much less about what they wish they’d done earlier.

    Those reflections usually appear later in the process, after applications have been submitted or deadlines have passed. Often, they come with a sense of hindsight: “I wish I’d known this sooner.”

    For students still early in the process, planning ahead can make everything feel far more manageable – and these tips are here to help.

    Starting earlier helps more than you think

    One of the most common reflections from students is that they waited until something felt urgent.

    Until a deadline appeared. Until a university responded. Until friends started applying.

    By that point, the process often felt rushed and stressful.

    Students who started earlier didn’t necessarily have everything figured out. In many cases, they simply gave themselves more time to think clearly, explore options and make decisions without pressure.

    Starting early doesn’t mean completing everything immediately. It simply means beginning before the process becomes overwhelming.

    Many students don’t realize how much flexibility they have

    Many students assume there is only one way to complete each step of the study abroad process. One test format. One timeline. One fixed path.

    In reality, there are now more flexible options available to students applying to universities in the USA.

    For example, some English language tests can now be taken from home, making it easier for students to fit preparation and testing around school, work or other commitments. This can reduce travel time, scheduling difficulties and unnecessary stress earlier in the application journey.

    Having more flexibility often helps students feel more in control of the process overall.

    Comparing timelines usually creates more stress

    This is something that comes up constantly in student discussions online.

    One student already has an offer. Another has booked their English test. Someone else is still deciding where to apply.

    It’s easy to feel behind, even when you’re not.

    What many students realize later is that study abroad timelines are rarely comparable. Different universities, application requirements, intake dates and personal circumstances all affect how long the process takes.

    The students who felt most confident were usually the ones focused on their own next step rather than someone else’s progress.

    Small steps create momentum

    Another common theme in student reflections is the importance of momentum.

    Not huge achievements. Just consistent progress.

    Researching universities. Booking a test. Submitting one document. Sending one email.

    Small actions help the process feel more realistic and manageable. Over time, they build confidence and make studying abroad feel achievable rather than distant.

    Confidence often comes later than expected

    Many students spend the early stages of the process questioning themselves.

    Am I choosing the right university?
    Am I applying at the right time?
    Am I making the right decisions?

    Later, many reflect that they were more prepared than they initially believed.

    The process itself teaches students how to make decisions, adapt to uncertainty and move forward even without having every answer immediately.

    Waiting until you feel completely ready can sometimes unnecessarily delay progress.

    Final thoughts

    Planning to study in the USA is a major decision, and it’s normal for the process to feel uncertain at times. But many students later realise that starting earlier, staying focused on manageable steps and avoiding unnecessary comparison made the experience much easier.

    You do not need to have everything figured out straight away. Often, the most helpful thing is simply beginning.