diff --git a/ChangeLog b/ChangeLog
index 4f03e3d3d..b46e8831a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jan  4 22:40:00 1999  Richard Frith-Macdonald <richard@brainstorm.co.uk>
+
+	* Source/NSCalendarDate.m: ([-yearOfCommonEra]) fix rounding error.
+
 Tue Dec 21 13:27:00 1999  Richard Frith-Macdonald <richard@brainstorm.co.uk>
 
 	Fixes suggested by karl@nfox.com
diff --git a/Source/NSCalendarDate.m b/Source/NSCalendarDate.m
index 54de1b554..c85d775e4 100644
--- a/Source/NSCalendarDate.m
+++ b/Source/NSCalendarDate.m
@@ -852,13 +852,9 @@
 - (int) yearOfCommonEra
 {
   int m, d, y;
-  int a;
 
-  // Get reference date in terms of days
-  a = (_seconds_since_ref+[_time_zone timeZoneSecondsFromGMT]) / 86400;
-  // Offset by Gregorian reference
-  a += GREGORIAN_REFERENCE;
-  [self gregorianDateFromAbsolute: a day: &d month: &m year: &y];
+  [self gregorianDateFromAbsolute: [self dayOfCommonEra]
+	day: &d month: &m year: &y];
 
   return y;
 }
diff --git a/Testing/nsdate.m b/Testing/nsdate.m
index ef2afd8d6..74b74e36d 100644
--- a/Testing/nsdate.m
+++ b/Testing/nsdate.m
@@ -143,6 +143,7 @@ main()
     c = [NSCalendarDate dateWithString: @"1999-12-31 23:59:59"
 			calendarFormat: @"%Y-%m-%d %H:%M:%S"];
     printf("Start at %s\n", [[c description] cString]);
+    printf("YYYY-MM-DD %d-%d-%d\n", [c yearOfCommonEra], [c monthOfYear], [c dayOfMonth]);
     c = [c addYear:0 month:0 day:0 hour:0 minute:0 second:1];
     printf("Add one second - %s\n", [[c description] cString]);
     c = [c addYear:0 month:0 day:0 hour:0 minute:0 second:1];