Fatal error: Uncaught Error: Access to undeclared static property sis\Form::$DATE in /mnt/web320/b2/90/510060490/htdocs/modcal/ctrl.php:171
Stack trace:
#0 {main}
  thrown in /mnt/web320/b2/90/510060490/htdocs/modcal/ctrl.php on line 171