prop. n. The year used by Muslims, consisting of twelve lunar months without intercalation, so that they retrograde through all the seasons in about 321/2 years. The Mohammedan era begins with the year 622 a. d., the first day of the Mohammedan year 1332 being Nov. 30, 1913, according to the Gregorian calendar. [ Webster 1913 Suppl. ]