Datepair.js is a lightweight, modular javascript plugin for intelligently selecting date and time ranges, inspired by Google Calendar. It will keep the start and end date/times in sync and can set default values based on user action. ...
jQuery Timepicker is a lightweight timepicker plugin for jQuery inspired by Google Calendar. It supports both mouse and keyboard navigation, and weighs in at 2.5kb minified and gzipped. ...
FullCalendar is a jQuery plugin that provides a full-sized, drag & drop calendar like the one below. It uses AJAX to fetch events on-the-fly for each month and is easily configured to use your own feed format. ...
JS Tutorial