The simply the best collection of datetime scripts
A jQuery plugin that sets a div or span to show a countdown to a given time and date.
Add datepicker picker to field or to any other element. Can be used as a component.
A complete date/time picker based on Twitter Bootstrap.
A jQuery plugin that makes it easy to support automatically updating fuzzy timestamps like "4 minutes ago" or "about 1 day ago" from ISO 8601 formatted dates and times embedded in your HTML.
Kalendae is an attempt to do something that nobody has yet been able to do: make a date picker that that just works.