Word.ws English Dictionary

Newtonmas

Newtonmas proper noun: december 25, Isaac Newton's birthday (in the Julian calendar).

Proper noun

Newtonmas (plural Newtonmases)

  1. (humorous) December 25, Isaac Newton's birthday (in the Julian calendar).
    • At Christmas, 1890, or Newtonmas, 248, for the first time, the members of the Newtonkai, or Newton Association, met in the Physical Laboratory of the Imperial University, to hear each other talk, to distribute appropriate gifts, and to lengthen out the small hours with laughter and good cheer.1892 September 8, “"A New Sect of Hero Worshippers."”, in Nature, volume 46, number 1193, →ISSN, page 459
    • Two of my friends (both Jewish) take 25 December as the holiday Newtonmas, in celebration of the birth of Sir Isaac Newton.1992 December 8, Nomi Pearlman, “Re: All these x-mas filks are making”, in alt.music.filk (Usenet), message-ID <104320@bu.edu>
  2. (humorous) December 25 through January 4, Isaac Newton's birthday (in the Gregorian calendar).
    • Olivia Judson, an evolutionary biologist, recommends celebrate Newtonmas on December 25th and ten extra days representing the interval between Newton's birth dates on the Julian and Gregorian calendars.2008 December 23, Olivia Judson, “The 10 Days of Newton”, in Tw:he New York Times, archived from the original on 25 Nov 2024

Examples of Newtonmas in a sentence

  • So why not put some sense into your festivities and celebrate Newtonmas this year?2000 December 26, Lloyd Miller, quoting Alexander Chislenko, “Merry Newtonmas!”, in talk.atheism (Usenet), message-ID...
  • On the first day of Newtonmas, Sir Isaac gave to me / The acceleration of gravity[…]2007, “Newtonmas Carols”, in Mansfield Public Schools, archived from the original on 27 Dec 2010:
  • Sir Isaac Newton was born on December 25, 1642 (old style), so it seems natural to take advantage of that complete coincidence and celebrate his life and works as Newtonmas.2007 December 22, Matt Blum, “It’s Beginning to Look a Lot Like Newtonmas”, in WIRED, →ISSN, archived from the original on 07 Oct 2009:
  • Donalee Tauber has obviously never heard of Hanukkah, Ramadan, Diwali, New Year's Day, Newtonmas, Solstice, Kwanzaa or Yule.2010 December 27, Tom Ingram, “Have Your Say”, in Winnipeg Free Press, →ISSN, page A16:

Forms of Newtonmas

pluralNewtonmases

Origin of Newtonmas

From Newton + -mas, after Isaac Newton.

Questions about Newtonmas

What does Newtonmas mean?
Newtonmas means december 25, Isaac Newton's birthday (in the Julian calendar).
How do you use Newtonmas in a sentence?
So why not put some sense into your festivities and celebrate Newtonmas this year?
What part of speech is Newtonmas?
Newtonmas is a proper noun.

Words near Newtonmas in the dictionary

  1. newtonias
  2. Newtonic
  3. Newtonism
  4. Newtonist
  5. Newtonists
  6. Newtonmas
  7. Newtonmases
  8. Newtonmore
  9. newtons
  10. Newtonville
  11. Newtown

Source and license

Adapted from Wiktionary: Newtonmas (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Flame, not lame-Newtonmas.wav.

Cite this entry: “Newtonmas.” Word.ws, https://word.ws/newtonmas. Based on Wiktionary, CC BY-SA 4.0.