Answer:
(Fatwa: 1271/791/L=1433)
There is no fixed order of fast on the 15th Shaban. However, the order of keeping fast on 15th of Shaban is mentioned therein a weak traditions of Ibn Majah; hence it is better to keep the fast of 15th of Shaban.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
