Re: Why?
But when, why and who started it as a month of mourning? It was not the case during the time of Prophet Muhammad (SAW) nor it was the case during the 4 Caliphs. Infact after the death of Prophet Muhammad (saw) the Sahabi's or the Caliphs never stated that the month of Rabi al-Awwal should be considered as the month of mourning since Prophet Muhammad (saw) died in that month.
Its a sincere question.