JQueryFullCalendar

Homepage: http://arshaw.com/fullcalendar/
Author(s): Adam Shaw
Version: 1.4.1

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 (an extension is provided for Google Calendar). It is visually customizable and exposes hooks for user-triggered events (like clicking or dragging an event).

Example: default

Example: Async

JSON events

[
  {
    id: 1,
    title: 'Event1',
    start: 'May 23 2012',
    allDay: true
  },
  {
    id: 2,
    title: 'Workingday',
    start: 'May 23 2012 08:30:00',
    end: 'May 23 2012 15:00:00',
    allDay: false
  }
]