Now, how do you find out what the ISO standard is for a particular thing? I'd be quite interested to know what the ISO for sizes and shapes of the numerous screwdriver heads are. Philips, torx, star, hex, flat... there's tonnes of the bastards!
I prefer YYYY-MM-DD myself (e.g. 2005-08-17) as numbers are universal whereas letters are language-dependent. There might still be some confused Americans, but anyone with half a brain will guess that the second number is the month from the fact that the year is clearly the first number.
Yeah this is correct, "Jan", "Feb", "Mar" etc are language-specific and not good protocol, but I like to think that while people are getting used to ISO 8601 it makes it doubly clear what the format is.