/** * Set the Excel calendar (Windows 1900 or Mac 1904) * * @param integer $baseDate Excel base date (1900 or 1904) * @return boolean Success or failure */ public static function setExcelCalendar($baseDate) { if ($baseDate == self::CALENDAR_WINDOWS_1900 || $baseDate == self::CALENDAR_MAC_1904) { self::$_excelBaseDate = $baseDate; return TRUE; } return FALSE; }