Home   Calendar   Holidays   Fun   Thesaurus Day

Jan18 Fun Holiday – Thesaurus Day

January 18 is Thesaurus Day. Impress your family and friends with big, complicated, and fancy sounding words to celebrate this lexicographic holiday.

The word strategy written in a thesaurus.

The word thesaurus comes from the Greek word for treasury or storehouse.

©bigstockphoto.com/Simon Valentine

The unofficial holiday commemorates the birth anniversary of British lexicographer and physician, Peter Mark Roget, the author of the Roget’s Thesaurus.

Storehouse of Words

A thesaurus is a book that compiles words grouped by similarity of meaning. The term thesaurus comes from the Greek word, thesauros, meaning treasure or storehouse.

Roget's Thesaurus is one of the most widely used reference books in the English language around the world. It was first published in 1852 with 15,000 words. Since then, the book has never gone out of publication.

Therapeutic Origins

It is believed that Roget worked on making word lists that later became the Roget's Thesaurus as a way to combat with depression and mental illness. Roget is also known for inventing the log slide rule in 1814. The slide rule helps calculate the roots of number very easily.

How to Celebrate?

  • Bring out your thesaurus and carry it with you the whole day, using it every time you want to speak with someone.
  • Play a game of Synonym.

Did You Know…

…that synonym is an antonym of antonym?

Thesaurus Day Observances

Fun Holiday: Thesaurus Day Observances
YearWeekdayDateName
2020SatJan 18Thesaurus Day
2021MonJan 18Thesaurus Day
2022TueJan 18Thesaurus Day
2023WedJan 18Thesaurus Day
2024ThuJan 18Thesaurus Day
2025SatJan 18Thesaurus Day
2026SunJan 18Thesaurus Day
2027MonJan 18Thesaurus Day
2028TueJan 18Thesaurus Day
2029ThuJan 18Thesaurus Day

See all Fun Holidays

Other Fun Holidays around January 18

17 Jan

Kid Inventors' Day

Recognize the ingenuity, resourcefulness, and imagination of kid inventors around the world.

18 Jan

Soup Swap Day

Combat the winter cold by cooking different types of soup and sharing them with family and friends.

19 Jan

Tin Can Day

Recognize the role the humble tin can plays in kitchens and pantries around the world.