Tools\Utility\Time::wasDayBeforeYesterday PHP Method

    public static function wasDayBeforeYesterday($dateString, $timezone = null)
    {
        $date = new DateTime($dateString, $timezone);
        $date = $date->format('U');
        return date(FORMAT_DB_DATE, $date) === date(FORMAT_DB_DATE, time() - 2 * DAY);
    }