I'm glad people are liking the question - thanks for the positive comments everyone.
I was motivated to come up with the question after following a discussion relating to a QotD from a few weeks ago. There was some (at times quite heated!) debate around language-independent date formats, so I thought it would be good material for a question, and hopefully some more discussion.
Incidentally, there's a "second date" scheduled to be published next week, so anything you read in those links could be handy...