diff --git a/calendar-export.plx b/calendar-export.plx
index c88469a..c86a451 100755
--- a/calendar-export.plx
+++ b/calendar-export.plx
@@ -52,7 +52,7 @@
 # "GPLv3".  If not, see <http://www.gnu.org/licenses/>.
 
 # The functions DoLog, BinarySearchForTZEntry, PrivatizeMergeAndTZIcalFile,
-# BuildTZList, PrivacyFilterICalFiles, and FilterEmacsToICal material
+# BuildTZList, MergeLists, PrivacyFilterICalFiles, and FilterEmacsToICal material
 # copyrighted and licensed as below:
 
 # Copyright © 2006 Software Freedom Law Center, Inc.
@@ -223,6 +223,19 @@ sub BinarySearchForTZEntry {
   return  $tzList->[$final];         # not found, go down one lower
 }
 ###############################################################################
+# Take a list of keys and a list of values and insersperse them and
+# return the result
+sub MergeLists {
+    my ($keys, $values) = @_;
+    DieLog("Length mismatch", $LOCK_CLEANUP_CODE) unless @$keys == @$values;
+    # Add the argument names to the values
+    my @result;
+    for (my $i = 0; $i < @$keys; $i++) {
+	push @result, $keys->[$i] => $values->[$i];
+    }
+    return @result;
+}
+###############################################################################
 sub BuildTZList ($$$) {
   my($user, $pubEmacsFile, $privEmacsFile) = @_;