Grav\Plugin\Admin\Admin::guessDateFormat PHP Метод

    public function guessDateFormat($date)
    {
        static $guess;
        $date_formats = ['m/d/y', 'm/d/Y', 'n/d/y', 'n/d/Y', 'd-m-Y', 'd-m-y'];
        $time_formats = ['H:i', 'G:i', 'h:ia', 'g:ia'];
        if (!isset($guess[$date])) {
            foreach ($date_formats as $date_format) {
                foreach ($time_formats as $time_format) {
                    if ($this->validateDate($date, "{$date_format} {$time_format}")) {
                        $guess[$date] = "{$date_format} {$time_format}";
                        break 2;
                    } elseif ($this->validateDate($date, "{$time_format} {$date_format}")) {
                        $guess[$date] = "{$time_format} {$date_format}";
                        break 2;
                    }
                }
            }
            if (!isset($guess[$date])) {
                $guess[$date] = 'd-m-Y H:i';
            }
        }
        return $guess[$date];
    }