Jquery date/time calendar

The Any+Time™ JavaScript Library includes a highly-customizable, jQuery-compatible datepicker/ timepicker (calendar/ clock widget) and a powerful Date/String parse/format utility

http://jquery.developmental.co.za/datetime

http://trentrichardson.com/examples/timepicker/

http://www.ama3.com/anytime/

http://stackoverflow.com/questions/1245245/jquery-date-time-picker