[Mono-list] DateTime formatting

[Thomas P. Schrantz]

Don't trust the examples in the MSDN docs for DateTime's formatting.  For
some reason, they were done on a system using 24 hr time, and frequently
won't match what DateTime.ToString() will actually return.
I think the docs are correct if the system is set to use 24 hr time, though.
And the format specifier documentation seems to be vague in places.
Definitely, full direct testing should be done to find out exactly what
everything should do.