This repo contains a javascript based calendar (FlatCalendarXP) and date picker (PopCalendarXP). Please visit http://www.calendarxp.net for more detailed introductions and manual.
It's as easy as embed an <iframe> tag in page. Detailed tutorials can be found here http://www.calendarxp.net/Tutorials.shtml
CalendarXP is © 2013 Victor Weng and may be freely distributed under the MIT license.