Merry Grav-Mass!

Here are some new 2023 Grav-Mass cards!!

Newton Ornament. Copyright
2012 Nathan Davis Released under Creative Commons
Attribution Sharealike 3.0.

On December 25, Isaac Newton's birthday, we celebrate the existence of comprehensible physical laws. Remember, Gravitation is a well-established scientific theory, but Intelligent Falling is just religion pretending to be science.

Please take some time to read this post about grav-mass celebration traditions of years past

Here's a gallery of Grav-Mass cards that you can contribute to.

One way to celebrate Grav-Mass is to decorate a tree with apples and other fruits. Glue them or attach them, but not too well! The idea is that occasionally a fruit should fall. Put them on the tree no more than 2 feet up, so that they won't get damaged or hurt anybody when they fall. Investigating and perfecting the methods for doing this is a great way expose a child to the process of scientifically studying the behavior of the physical world.

Another way to celebrate Grav-Mass is by throwing a ball or fruit back and forth.

Another way to celebrate Grav-Mass, in a group, is by telling each other about scientific knowledge and understanding, or discussing what kind of experiment could answer an unresolved question about the world.

There is a Grav-Mass discussion group. To participate you will need an account on a GNU Social server (you can find several options here) although read only access does not require any account.

We have one Grav-Mass carol, We Three Laws. If you know of any others, please tell me about them: rms at gnu dot org. Other songs about science are also suitable to play or sing on Grav-Mass;

The Symphony of Science.

The Ten Days of Newton.

Also, The Galaxy Song by Monty Python. (And some commentaries on it.)

A lost Grav-Mass tradition: the Scient Clowns come and teach.

What's the traditional cake to eat on Grav-Mass?
Panewtone. (From Alexandre Oliva.)

In Bahasa Indonesia: Selamat Hari Gayaberat.
In Bulgarian: Vesela Gravoleda (or ɡrəvɒ'lɛdə)
In Chinese, 牛诞节快乐！.
The first three characters mean Grav-Mass and are pronounced Niú Dàn Jié; Niú means Newton, Dàn means birth, Jié means holiday.
In Esperanto, Feliĉan Gravitnaskon
In Farsi: میلاد نیوتن مبارک (meelad-e newton mobarak)
In French, Joyeux Newël.
In German, Frohe Schwernachten.
In Greek, Kαλά Bαρυτούγεννα (Kala Varitouyenna).
In Hindi, Grav-Mass ki shubhkamnaye
In Italian, Buon Gravitale.
In Japanese, グラブマスおめでとうございます! (Grav-mass omedetou gozaimasu!)
Or アイザック・ニュートンの誕生日おめでとうございます! (Nyuuton no tanjoubi omedetou gozaimasu!)
In Malayalam, ഗ്രാവ് - മാസ് ആശംസകൾ (Grav-Mass Maashamsakal)
In Polish, Grawiazdka.
In Portuguese: Feliz Newtal!
In Russian: С рождеством Ньютоновым (S roždestvom Nyutonovım).
In Spanish: ¡Feliz Gravidad!

I think the idea of Grav-Mass was conceived by science fiction writer James Hogan.

On Dec 19, 2012, I opened an envelope and saw what I believe was the first Grav-Mass card ever made. It was made and sent to me by Simon and Jane Whiteley. Here are the images that appear in the card, in case you would like to make some.

Here's info about their family Grav-Mass celebration in 2012.

Here is another Grav-Mass card.

Here is an animation of the card.

Here is a French-language Grav-mass card in either a light, or dark background.

Here are some photos of Nolene Ferrari Naidu's Grav-Mass tree.

Return to Richard Stallman's home page.

Please send comments on these web pages to rms@gnu.org.

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