Edit.php

...
...
        $this->add(
            array(
                'name' => 'date',
                'type' => 'datetime',
                'options' => array(
                    'format' => 'd/m/Y H:i:s',
                    'label' => 'Date (format: dd/mm/yyyy hh:mm:ss)',
                ),
                'filters' => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
                'attributes' => array(
                    'id'       => 'date',
                    'required' => 'required',
                    'title'    => 'Date',
                ),
            )
        );
...

Error Message

Fatal error: Maximum execution time of 30 seconds exceeded in ...vendor\zendframework\zendframework\library\Zend\Validator\DateStep.php on line 350