Shaykh Salih al-Fawzan's statement regarding fasting and night prayer on 15th Shaban: Specifying a time for any Ibadah requires Daleel (authentic), so if there is no Daleel, this Act is Bidah. [ Noorun alad-Darb Fataawa Shaykh Saalih Ibn Fowzaan - Volume 1, Page 87]