diff -Nurb libical-0.44.orig/src/libical/icaltimezone.c libical-0.44/src/libical/icaltimezone.c
--- libical-0.44.orig/src/libical/icaltimezone.c	2013-01-31 10:26:29.000000000 +0100
+++ libical-0.44/src/libical/icaltimezone.c	2013-01-31 10:25:22.000000000 +0100
@@ -883,9 +883,12 @@
 	change_num += step;
 
 	/* If we go past the start of the changes array, then we have no data
-	   for this time so we return a UTC offset of 0. */
-	if (change_num < 0)
-	    return 0;
+	   for this time so we return the prev UTC offset. */
+	if (change_num < 0) {
+	    if (is_daylight)
+		*is_daylight = ! tmp_change.is_daylight;
+	    return tmp_change.prev_utc_offset;
+	}
 
 	if ((unsigned int)change_num >= zone->changes->num_elements)
 	    break;