diff --git a/doc/misc/ChangeLog b/doc/misc/ChangeLog
index 6be52213a4a..92eda67599f 100644
--- a/doc/misc/ChangeLog
+++ b/doc/misc/ChangeLog
@@ -1,3 +1,8 @@
+2012-11-23  Jay Belanger  <jay.p.belanger@gmail.com>
+
+	* calc.texi (Date Formatting Codes): Mention the new beginning of
+	the date numbering system.
+
 2012-11-22  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* calc.texi: Fix TeX issues with capitals followed by ".", "?", "!".
diff --git a/doc/misc/calc.texi b/doc/misc/calc.texi
index 0ce1efbff58..7e60f4b190f 100644
--- a/doc/misc/calc.texi
+++ b/doc/misc/calc.texi
@@ -13439,7 +13439,7 @@ the time part.  The punctuation characters (including spaces) must
 match exactly; letter fields must correspond to suitable text in
 the input.  If this doesn't work, Calc checks if the input is a
 simple number; if so, the number is interpreted as a number of days
-since Jan 1, 1 AD@.  Otherwise, Calc tries a much more relaxed and
+since Dec 31, 1 BC@.  Otherwise, Calc tries a much more relaxed and
 flexible algorithm which is described in the next section.
 
 Weekday names are ignored during reading.