National Thesaurus Day – Jan. 18, 2027

National Thesaurus Day
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Activities
Where:
United States
Date change rule:
Every January 18
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National Thesaurus Day celebrates the invaluable linguistic tool every January 18. This day honors Peter Mark Roget, the creator of the modern thesaurus, and encourages everyone to explore the richness of the English language. Expand your vocabulary, refine your writing, and discover new ways to express yourself.

Want to sponsor National Thesaurus Day? Learn how

Expected National Thesaurus Day Deals

While National Thesaurus Day isn’t typically a major retail holiday, we expect to see special promotions on educational resources and writing tools. Look for discounts from brands like Merriam-Webster and Oxford Languages on their digital subscriptions and print editions. Writing software companies such as Grammarly and Scrivener may offer limited-time deals on their premium services. Online course providers like MasterClass or Skillshare might feature sales on writing and communication courses. Local bookstores could host events or offer discounts on books about language and literature. We will update this page with confirmed live deals as January 18 approaches.

Platform Guide for National Thesaurus Day

LinkedIn

Tag National Today (linkedin.com/company/nationaltoday) and use #NationalThesaurusDay. Share a post about how a robust vocabulary enhances professional communication.

X/Twitter

Mention @NatlToday and use #NationalThesaurusDay. Participate in wordplay challenges or share your favorite obscure words and their synonyms.

Instagram

Tag @nationaltoday_ and use #NationalThesaurusDay. Post aesthetically pleasing photos of your favorite thesaurus, word art, or beautifully written quotes.

Social Media Tips for National Thesaurus Day

Individuals

Challenge yourself to use a new synonym for a common word in your daily conversations or writing. Explore a digital thesaurus to discover nuanced meanings.

Creators

Create content showcasing the power of a thesaurus, such as '5 Words to Elevate Your Writing' or a 'Synonym Swap Challenge' for popular phrases.

Brands

Run a 'Word of the Day' campaign featuring an interesting synonym and its usage. Engage your audience by asking them to share their favorite words or writing tips.

Partners & Brands for National Thesaurus Day

  1. Merriam-Webster

    Founded in 1831 by George and Charles Merriam, Merriam-Webster is America's oldest dictionary publisher. They produce widely respected dictionaries and thesauri, both in print and digital formats, serving as a primary authority on the English language.

  2. Oxford Languages

    As the world's largest dictionary publisher, Oxford Languages is a department of Oxford University Press. They are renowned for their comprehensive dictionaries and thesauri, including the Oxford English Dictionary, providing authoritative language resources globally.

  3. Grammarly

    Founded in 2009, Grammarly is an AI-powered writing assistant that helps users improve their grammar, spelling, punctuation, clarity, and style. Its suggestions often include synonym alternatives to enhance vocabulary and readability.

  4. Penguin Random House

    Formed in 2013 by the merger of Penguin Group and Random House, this is one of the largest trade book publishers in the world. They publish a vast array of fiction and non-fiction, including many reference books and literary works that benefit from rich vocabulary.

  5. Scrivener

    Developed by Literature and Latte, Scrivener is a word-processing program and outliner designed for writers. It offers tools for organizing research, notes, and documents, making it easier for authors to craft complex narratives with precise language.

  6. Barnes & Noble

    Founded in 1886, Barnes & Noble is the largest retail bookseller in the United States. They offer a wide selection of books, including thesauri and other reference works, providing accessible resources for language enthusiasts and writers.

  7. Amazon

    Founded by Jeff Bezos in 1994, Amazon began as an online bookstore and has grown into a global e-commerce and technology giant. It remains a primary destination for purchasing physical and digital thesauri, making word power accessible worldwide.

National Thesaurus Day Hero

Peter Mark Roget

Peter Mark Roget (1779-1869) was a British physician, natural theologian, and lexicographer, best known for compiling Roget's Thesaurus. He began working on the classification of words and phrases in 1805, eventually publishing his monumental 'Thesaurus of English Words and Phrases' in 1852. Roget's work provided a systematic arrangement of concepts and their corresponding words, revolutionizing how writers could access and utilize synonyms and antonyms. His enduring legacy is a tool that continues to empower millions to articulate their thoughts with precision and eloquence.

National Thesaurus Day timeline

4th Century
Origins

Sanskritis had a thesaurus in verse form, titled ‘Amarakosha.’

1848
A Mammoth Task

Peter Mark Roget begins writing the unofficial ‘Thesaurus.’

1852
The Thesaurus is Born

Roget completes the first ‘Thesaurus.’

2009
Modern Variation

The Historical Thesaurus of English includes the date next to each word of when it got its meaning.

How Businesses Can Celebrate National Thesaurus Day

Local businesses can celebrate National Thesaurus Day by embracing the power of words in their marketing and customer interactions. Bookstores and libraries can host ‘word of the day’ displays or writing workshops, offering discounts on thesauri and writing guides. Cafes might create menu items with cleverly descriptive names, encouraging patrons to use more evocative language. Marketing agencies could share tips on crafting compelling copy, emphasizing the importance of a rich vocabulary. Educational centers can highlight courses focused on language arts and creative writing, inspiring a deeper appreciation for words.

National Thesaurus Day FAQs

When is National Thesaurus Day?

In 2027, National Thesaurus Day is observed on Monday, January 18. Mark your calendar to celebrate the invaluable resource that helps us find the perfect word.

How many words are in a typical thesaurus?

While the exact number varies by edition and publisher, many popular print and digital thesauri today boast over 300,000 words and phrases. This extensive collection supports writers in finding precise and varied language.

Who invented the thesaurus?

While the concept of word lists and synonym dictionaries existed earlier, Peter Mark Roget is credited with creating the systematic, concept-based thesaurus we recognize today. His innovative classification system remains the standard.

What is the difference between a thesaurus and a dictionary?

The primary distinction is purpose: a dictionary defines words, while a thesaurus helps you find the ‘right’ word for a particular context by offering alternatives. They are complementary tools for language mastery.

National Thesaurus Day Activities

  1. Play a game of "synonym password"

    Pair up with a friend to see if you can stump each other on this game show variation. Make a stack of cards with words on them, and on each turn, give your partner up to three synonyms for the word on the card. Try to get them to figure out the original word. For instance, for a card with “party” on it, you could say “celebration,” “shindig,” or “festivity.”

  2. Rewrite a famous poem or story

    Have a little fun switching out the words of famous works and see if you can make them better! Take Edgar Allen Poe’s "The Raven," for instance. “Once upon a midnight dreary, while I pondered, weak and weary,” could turn into “Once upon a boring night, while I thought, frail and fatigued.”

  3. Flip through a thesaurus, for old time's sake

    These days, we mostly use the an online thesaurus, but paging through a book can lead you to many new words! Spend some time looking up favorites, you know, your darlings, number ones, idols, beloveds, dears, and faves.

Why We Love National Thesaurus Day

  1. It helps us expand our vocabulary

    A bigger vocabulary is better (or exceptional, superior, and of higher quality)! It helps us communicate with different groups of people, which in turn bolsters self-confidence. It even aids in important events, like preparing for a job interview or writing a speech for a class. It helps you speak more effectively and write with greater breadth and clarity.

  2. Bigger vocabularies help kids learn

    More word choices are just good for adults, but kids, too! If a child has enough words in his or her stash, they can fully describe what they are thinking, how they are feeling, and what they want. And, if they know more words, they are better at reading comprehension. This will lead to better grades and an easier time in school!

  3. It helps us tell a better story

    What would the Three Little Pigs have been without a thesaurus? The nursery rhyme favorite turns to synonyms to create a rhythm and urgency. Instead of just simply saying he would take down the house with a big gust of air, he added some excitement: “I’ll huff, and I’ll puff, and I’ll blow your house down!” Different words make stories more stimulating and fun.

National Thesaurus Day dates

Year Date Day
2027 January 18 Monday
2028 January 18 Tuesday
2029 January 18 Thursday
2030 January 18 Friday
2031 January 18 Saturday