Assalam Alikom Mufti,
Please tell me the 2 best days that one should fast in the month of shaban.
The whole month of Sha'ban is an ideal time for voluntary Fasting. However, according to the advice of the holy Prophet Sallallahu Alaihe Wa Sallam; one should avoid observing voluntary Fasting after the first half of Sha'ban. So the ideal practice would be to observe the Fasting of 13, 14 and 15 of Sha'ban.
And Allah knows best.
Mufti Ikram ul Haq
Fatwa Center of America