The Shaykh (Al-Mufid), may Allah سبحانه وتعالى have mercy on him, said: “Concessions have come from the Truthful Ones (Imams عليه السلام), peace be upon them, regarding advancing it by two months before its due time and delaying it by two months, and there has also come three months and four months when there is a need for that.” That which indicates this is what he narrated (in the following hadith):
