indicate that the years for which the calendar function will work are
platform dependent. See SF bug 434143.
diff --git a/Doc/lib/libcalendar.tex b/Doc/lib/libcalendar.tex
index c6ca67f..e279bd3 100644
--- a/Doc/lib/libcalendar.tex
+++ b/Doc/lib/libcalendar.tex
@@ -79,7 +79,8 @@
Optional parameters \var{w}, \var{l}, and \var{c} are for date column
width, lines per week, and number of spaces between month columns,
respectively. Depends on the first weekday as set by
-\function{setfirstweekday()}.
+\function{setfirstweekday()}. The earliest year for which a calendar can
+be generated is platform-dependent.
\end{funcdesc}
\begin{funcdesc}{timegm}{tuple}