According to the islamic calendar and what year did muhammad return to makkah? and what year did muhammad die? what years were these in the christian calendar?

       622 is the year when the Islamic calendar begins. It is the year of Hijrah from Makkah to Medina. 
      According to the Islamic calendar Mehammad returned to Makkah in 8 AH ( Anno Hegirae ) or in 629  ( Christian calendar ).
      Muhammad died in 11 AH ( or 632 ).

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