March 6, 2013
7:14 p.m.
Patrice Scattolin <patrice.scattolin@oracle.com> writes:
Since we have no idea of emacs' algorithm [...]
Emacs is free software; it's possible to see what algorithm it uses by examining the (well-commented) source code: http://git.savannah.gnu.org/cgit/emacs.git/tree/lisp/calendar/lunar.el
For the record, anyone who would want to do to the math themselves is encouraged to look at Astronomical Algorithms http://www.amazon.com/Astronomical-Algorithms-Jean-Meeus/dp/0943396611
And that's exactly what Emacs' code is based on, as it happens! Thanks, -- Adam Sampson <ats@offog.org> <http://offog.org/>