'Time between', 'name' => $this::INTERVAL, 'fieldType' => 'datetime_interval', 'fieldOptions' => [ 'datetimepicker' => [ 'pickDate' => false, 'pickTime' => true, 'pick12HourFormat' => true, 'format' => 'HH:mm', ], ], 'value_transform' => function ($val) { return [ 'from' => strtotime('1970-01-01 ' . $val['from']), 'to' => strtotime('1970-01-01 ' . $val['to']), ]; }, ], ]; } }