Jyxo\Time\Util::isWorkDay PHP Method

    public static function isWorkDay(\Jyxo\Time\Time $day) : bool
    {
        $holidays = self::$holidays;
        // Adds Easter Monday. easter_date is supposed to be buggy http://cz.php.net/manual/en/function.easter-date.php#80664
        $year = (int) $day->format('Y');
        $days = easter_days($year);
        // $days returns the number of days from March 21st until the Easter Sunday, +1 because of Monday
        $holidays[] = date('j.n', strtotime($year . '-03-21 +' . ($days + 1) . ' days'));
        $isWorkDay = true;
        if ($day->format('N') > 5) {
            // Saturday or Sunday
            $isWorkDay = false;
        } elseif (in_array($day->format('j.n'), $holidays)) {
            // Public holiday, hurray!
            $isWorkDay = false;
        }
        return $isWorkDay;
    }