Is it permissible to single out the middle of Sha'ban for fasting?

Question:
May Allah reward you. This questioner says: Honorable Shaykh, we have a custom here, which is fasting on the middle of Sha'ban. When we advised them that this is not based on any evidence, they said that all people fast on these days. Is there anything from the Sunnah regarding this?

Answer:
Fasting for most of Sha'ban is established. If a person fasts many days of Sha'ban from its beginning, there is no harm in that. However, singling out the middle of Sha'ban is a bid'ah (religious innovation) with no basis. If he fasts many days of Sha'ban and the middle happens to fall within them, there is no harm. Or if his custom is to fast Mondays and Thursdays, and one of those days happens to be the middle of Sha'ban, there is no harm in fasting it, not as the middle of Sha'ban, but as a Monday or a Thursday. Likewise, if it is his custom to fast the white days, he fasts them in Sha'ban and in other months; they are the thirteenth, fourteenth, and fifteenth of every month. As for singling out the middle of Sha'ban for fasting and believing that this is prescribed, this is a mistake, and there is no evidence for it. All the evidence regarding fasting on the middle of Sha'ban is not authentic, and no ruling is based on it. Yes.