The supporters of the theory that there are twelve Imams for the Muslim Ummah believe that the twelfth Imam will be Al-Mahdi. They have been waiting for his emergence for more than twelve hundred years now. We do not know when Al-Mahdi may appear.
Tag: Muharram 10th
The fasting on the day of Ashura was made obligatory even before Ramadan; it was made obligatory in the first year after the hijrah, and everybody had to fast the first year. Then Allah revealed Ramadan, so Ramadan became obligatory, and the next year, Muharram became recommended and not obligatory.