When I have a date in the body of a mail message or task, it will highlight as a link, and when I hover over it, present some date based options.

The date seems to be using a format where:

AA-BB-CC

AA = year
BB = Month
CC = Day

Is there somewhere this can be changed so that CC is the year? If I enter it as AA/BB/CC then it seems to use Month/Day/Year.