Source: http://office.microsoft.com/en-us/outlook/HA101668851033.aspx?pid=CH101726981033#2 Applies to: Microsoft Office Outlook 2007 This feature applies to any language that enables an alternate calendar (alternate calendar: The calendar selected from within Outlook.): Arabic, English, Hebrew, Hindi, Chinese, Japanese, Korean, and Thai. The short and long date formats, for example, 11/01/07 or November 1, 2007, follow the date formats selected in the operating system's settings. The language of the month and weekday names depends on the country/region selected in the Regional and Language Options (Classic view in both Windows Vista and Microsoft Windows XP) or Regional Options (Microsoft Windows 2000) dialog box in Control Panel and on the calendar selected in the operating system. As a result, you can see alternate language or English Gregorian calendar (Gregorian calendar: The calendar in general use in Western countries/regions. It was introduced in 1582 A.D. as a revision to t...