datepicker and time

I see posts from over a year ago about adding time to the datepicker
widget. I'd really like to be able to use datepicker in my
application, but I really need to have the full ISO format, "YYYY-MM-
DD HH:MM:SS". I also saw that some people were writing their own time
extensions, but is anyone doing development on datepicker to add time
functionality to it directly?
Thanks in advance.