Wrong day of the week shown in calendar functions

See TID359841 for an explanation of this issue

On a workstation with WinXP or Win2000 setting the region to a country where the normal start of the week is Monday (e.g. UK, Germany and other countries in continental Europe). If the month begins on a Sunday, the calendar will return a wrong day of the week. This is not seen for a country setting where Sunday is the normal start of the week, e.g. USA.