Newtonmass? (was Re: [extropy-chat] Copycat Copycat)

[Brett Paatsch]

MB wrote:

> Happy Newtonmass to you all. :)

Well you too MB, if it's a good thing. 

But what is this Newtonmass stuff? 

Was Isaac Newton born on 25 December or something?

Is it considered that that is perhaps a relatively greater or clearer
cause for celebration than the current conventional or fashionable
alternatives?  I understand that there used to be a feast of Saturnia
or some such thing but fashions come and go. 
  
But Newtonmass? I don't exactly understand it. 

Brett Paatsch