Cliff Jones (4/13/2011)
A very good question. It is unfortunate that some are not getting the message that it is trying to convey, that not all date formats are portable across all language settings. If you ever have to port your application to a different country or language, this can cause a lot of rework.
It's slightly disappointing that the percentage of right answers is almost exactly the same as last week, but then it often takes a while for new concepts to sink in. Despite being in the UK, most of the servers we deal with are installed with US_English as the default language. I reckon it was several years before people (including me) noticed that the 'yyyy-MM-dd' format didn't work in "British", and I vaguely remember trying to debug an application that used the format and had stopped working when the database was moved to another server. It took ages to work out what the problem was, but once we had, the mistake was never made again!