--- a/include/common-transit.inc.php
+++ b/include/common-transit.inc.php
@@ -4,9 +4,26 @@
 	'saturday',
 	'weekday'
 );
+function getServiceOverride() {
+	global $conn;
+	$query = "Select * from calendar_dates where date = '".date("Ymd")."' and exception_type = '1'";
+	 debug($query,"database");
+	$result = pg_query($conn, $query);
+	if (!$result) {
+		databaseError(pg_result_error($result));
+		return Array();
+	}
+	return pg_fetch_assoc($result);
+}
 function service_period()
 {
+	
 	if (isset($_SESSION['service_period'])) return $_SESSION['service_period'];
+	$override = getServiceOverride();
+	if ($override['service_id']){
+		return $override['service_id'];
+	}
+
 	switch (date('w')) {
 	case 0:
 		return 'sunday';
@@ -16,5 +33,24 @@
 		return 'weekday';
 	}
 }
+function midnight_seconds()
+{
+	// from http://www.perturb.org/display/Perlfunc__Seconds_Since_Midnight.html
+	if (isset($_SESSION['time'])) {
+		$time = strtotime($_SESSION['time']);
+		return (date("G", $time) * 3600) + (date("i", $time) * 60) + date("s", $time);
+	}
+	return (date("G") * 3600) + (date("i") * 60) + date("s");
+}
+function midnight_seconds_to_time($seconds)
+{
+	if ($seconds > 0) {
+		$midnight = mktime(0, 0, 0, date("n") , date("j") , date("Y"));
+		return date("h:ia", $midnight + $seconds);
+	}
+	else {
+		return "";
+	}
+}
+?>
 
-?>