diff --git a/docs/reference/ChangeLog b/docs/reference/ChangeLog
index 7f63a2594..f2ba34f83 100644
--- a/docs/reference/ChangeLog
+++ b/docs/reference/ChangeLog
@@ -1,5 +1,8 @@
 2007-11-09  Matthias Clasen <mclasen@redhat.com>
 
+	* glib/tmpl/date.sgml: Add a footnote explaining leap years.
+	(#491982, Areg Beketovski)
+
 	* glib/tmpl/date.sgml: Improve g_date_clamp docs.  (#491970,
 	Areg Beketovski)
 
diff --git a/docs/reference/glib/tmpl/date.sgml b/docs/reference/glib/tmpl/date.sgml
index f7a6dff17..3af4e9d38 100644
--- a/docs/reference/glib/tmpl/date.sgml
+++ b/docs/reference/glib/tmpl/date.sgml
@@ -617,7 +617,10 @@ Returns %TRUE if the date is the last day of the month. The date must be valid.
 
 <!-- ##### FUNCTION g_date_is_leap_year ##### -->
 <para>
-Returns %TRUE if the year is a leap year.
+Returns %TRUE if the year is a leap year.<footnote><para>
+For the purposes of this function, leap year is every year divisible by
+4 unless that year is divisible by 100. If it is divisible by 100 it would 
+be a leap year only if that year is also divisible by 400.</para></footnote>
 </para>
 
 @year: year to check