Is the intention for fasting the white days valid after Fajr?

Question:
He says: Honorable Shaykh, may Allah grant you success. A person fasts the white days, but yesterday, on the thirteenth, he did not form the intention until ten in the morning. Some of the brothers objected to his action, saying that it is not valid and that he must break his fast, because the virtue of the white days is explicitly mentioned in the texts. What is the ruling on this? Is his fast valid?

Answer:
Or do they not mislead him? They have no right to speak about something they do not know. There is no harm; he should form the intention, because fasting the white days is voluntary, and a voluntary fast is valid with an intention made during the day, provided that he has not eaten or drunk after Fajr.