Islamic Calendar, The - Backgrounder of the Islamic calendar with sections on what an Islamic year looks like and the difference in years with the Gregorian calendar.
Islamic Finder: Hijiri Calendar - Hijiri to Gregorian date converter offering Ramadan calendar dates and other Islamic event dates.
Wikipedia: Islamic Calendar - Encyclopedia article about the Islamic or Hijri calendar, used to date events in predominantly Muslim countries and to determine the proper day on which to celebrate Muslim holy days.
