International Date Format (ISO-8601): The YYYYMMDD date format is the internationally agreed concise format for unambiguous dates and is to be adopted by everyone. It is logical, with the biggest denominators being listed first (same as numbers, times, weights, etc), making it easily sortable and utterly clear. The International Organization for Standardization specification for the International Date Format is the ISO-8601 format, adopted so far by the United Nations, commerce groups, scientific communities and most Western governments. "20050229" is an example of an ISO-8601 compliant date print - equal to 2005 Feb 29.
I have been using the YYYY MMM DD format since late 1999 when the Millennium Bug started to hit the news (Click any of the text to open the page in a new window).
International Date Format (ISO-8601)
August 16th, 2005