Nextras\Forms\Controls\DatePicker::getDefaultParser PHP Method

    protected function getDefaultParser()
    {
        return function ($value) {
            if (!preg_match('#^(?P<dd>\\d{1,2})[. -] *(?P<mm>\\d{1,2})([. -] *(?P<yyyy>\\d{4})?)?$#', $value, $matches)) {
                return null;
            }
            $dd = $matches['dd'];
            $mm = $matches['mm'];
            $yyyy = isset($matches['yyyy']) ? $matches['yyyy'] : date('Y');
            if (!checkdate($mm, $dd, $yyyy)) {
                return null;
            }
            $value = new Nette\Utils\DateTime();
            $value->setDate($yyyy, $mm, $dd);
            $value->setTime(0, 0, 0);
            return $value;
        };
    }