When this forum went live early in 2002, it used the old-style US "12/31/99 12:59 PM" date and time format. Then, more recently, for a short while it used the 99/12/31 date format which is close to the International Style, but it is now set to the 31/12/99 format as has been used in some European Countries.
My original point, above, was meant to also say to the original poster to check which time zone offset was being used in your Resource Zone profile setup, as this may have been responsible for the display of the wrong date and time on postings - they may have the date and time of another place. Note that the offset is from Eastern Standard Time (UTC-0500) and not from UTC as would normally be expected.