Fasting: Missed Intention for Obligatory Fast: Can It Count as Mustahabb?

Practical Laws of Islam as per the teachings of Imam Khamenei

Fasting: Missed Intention for Obligatory Fast: Can It Count as Mustahabb?

English:

Question #739:

A person, responsible for performing an obligatory fast, decided to fulfill his duty but could not because of unforeseen circumstances. For example, he prepared to travel after sunrise — he traveled, but failed to return home before noon. He had not done anything that invalidates the fast, except that the time for making the intention of an obligatory fast has elapsed; and that day is one in which fasting is mustaḥabb. Is it valid if he makes the intention to perform a mustaḥabb fast?

Answer #739:

When one is responsible for the qaḍā’ of Ramadan fast, it is invalid to make intentions to perform a mustaḥabb fast, even if the time for making intention for performing an obligatory fast has passed.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Fasting