This is the module for CalendarDate and CalendarDateTime in the Islamic (Hijri) calendar, a purely lunar calendar of twelve alternating 30- and 29-day months. Its year is about eleven days shorter than the solar year, so its dates drift through the seasons. The tabular form approximates the observed calendar with a 30-year leap cycle; the exact leap years and the starting epoch are selectable (see IslamicLeapYearPattern and IslamicEpoch).

Note: this calendar is not yet implemented.