Thanks for your comment.

I'm allowing for different date formats (dd-mm-yyyy, mm-dd-yyyy, yyyy-mm-dd) when making the puzzles. But it hadn't occurred to me that seeing a non-American date on the home page could be off-putting to Americans.

I guess I could try to recognize where people are from and show a location-specific example. Or maybe it's best to pick an ambiguous date ie one that works under both conventions. eg 12-5-1965 should do it.

Thanks again.