Is the Salam contract valid if the stipulated term is fixed (e.g., the month of Kanun al-Awwal) but unknown to the contracting parties?
Chapter on Guaranteed Salaf (Advance Payment) for a Specified Term
Al-Mughni
Book of Sales
Primary text
If the stipulation is for something fixed, such as the month of Kanun al-Awwal, but one or both contracting parties are unaware of it, the Salam contract is invalid because the term remains unknown to them.