Is the reappearance of Imam al Mahdi a specific date that Allah has chosen? I recently read somewhere that there is a محدد day Allah has chosen and no reason to pave a way. I found that confusing and I dont know if its correct. So heres the text I read " انه ظهوره المبارك محدد و هكذا الامام لا يحتاج لأمثالنا كي نمهد له".I always thought that the Imams reappearance, of course only known by Allah, is contingent.