Grav-mass

Grav-mass is Richard Stallman's parody of Christmas. He describes it as follows: 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.

Newton's birthday is 4th January 1643 according to the modern Gregorian Calendar, but was on Christmas according to the Julian Calendar in effect in England until the calendar reform of 1752.

see also

• Atheism
• Isaac Newton
• Calendar
• Year
• Newtonmass