calendar-gregorian-from-absolute
calendar-gregorian-from-absolute is a compiled Lisp function in `calendar.el
'.
(calendar-gregorian-from-absolute DATE)
Compute the list (month day year) corresponding to the absolute DATE.
The absolute date is the number of days elapsed since the (imaginary)
Gregorian date Sunday, December 31, 1 BC. This function does not
handle dates in years BC.