** Calc
++++
*** Calc by default now uses the Gregorian calendar for all dates, and
uses January 1, 1 AD as its day number 1. Previously Calc used the
Julian calendar for dates before September 14, 1752, and it used
December 31, 1 BC as its day number 1; the new scheme is more
consistent with Calendar's calendrical system and day numbering.
-*** The new variable `calc-gregorian-switch' lets you configure the
-date when Calc switches from the Julian to the Gregorian calendar.
-Nil, the default value, means to always use the Gregorian calendar.
-The value (YEAR MONTH DAY) means to start using the Gregorian calendar
-on the given date.
++++
+*** The new option `calc-gregorian-switch' lets you configure if
+(and when) Calc switches from the Julian to the Gregorian calendar.
++++
*** Support for ISO 8601 dates.
** CEDET