Synonyms for Islamic Calendar (same or very similar meaning)
WordNet sense 1 (the lunar calendar used by Muslims; dates from 622 AD (the year of the Hegira); the beginning of the Muslim year retrogresses through the solar year completing the cycle every 32 years):
Mohammedan calendar, Moslem calendar, Muhammadan calendar, Muslim calendarFrom the ODE community, based on WordNetadd/edit