--- /dev/null
+--TEST--
+"date_modify" filter
+--TEMPLATE--
+{{ date1|date_modify('-1day')|date('Y-m-d H:i:s') }}
+{{ date2|date_modify('-1day')|date('Y-m-d H:i:s') }}
+--DATA--
+date_default_timezone_set('UTC');
+return array(
+ 'date1' => '2010-10-04 13:45',
+ 'date2' => new DateTime('2010-10-04 13:45'),
+)
+--EXPECT--
+2010-10-03 13:45:00
+2010-10-03 13:45:00