--- a/include/common-transit.inc.php
+++ b/include/common-transit.inc.php
@@ -4,10 +4,17 @@
 	'saturday',
 	'weekday'
 );
-function service_period()
+
+function service_period($date = "")
 {
+	
 	if (isset($_SESSION['service_period'])) return $_SESSION['service_period'];
-	switch (date('w')) {
+	$override = getServiceOverride($date);
+	if ($override['service_id']){
+		return $override['service_id'];
+	}
+
+	switch (date('w',($date != "" ? $date : time()))) {
 	case 0:
 		return 'sunday';
 	case 6:
@@ -35,5 +42,5 @@
 		return "";
 	}
 }
+?>
 
-?>