About the only criticism of my transferred former Yahoo group of retired Marconi (UK) engineers was the date format. Absolutely no-one likes mm-dd-yyyy, everyone would be happy with the European dd-mm-yyyy but a fair few would be prepared to accept the ISO 8601 yyyy-mm-dd. I understand that to a US developer mm-dd-yyyy is familiar and doesn't yell "Change Me!" - but to a retired UK engineer it's very irritating and a potential source of schedule errors…
hmmm, what do you propose different for each region?
EG: Ygroups has U.K. groups.
Is the date there
European dd-mm-yyyy ?