Is it permissible to fast 15 consecutive days or more in the month of Sha’ban, or are there Sunnahs for fasting, and is fasting on the night of the 15th of Sha’ban established?

A Muslim is permitted to fast frequently in general, and it is recommended for him to fast frequently in the month of Sha‘ban in particular, due to what ‘A’ishah, may Allah be pleased with her, narrated: that the Prophet, peace and blessings be upon him, used to fast more frequently in Sha‘ban than in any other month, yet he never completed the fast of any month entirely except Ramadan. Fasting on the 15th of Sha‘ban is permissible if it coincides with a habitual fast or the fasting of the white days, but it is not legislated to single it out for fasting apart from the rest of the days of Sha‘ban.