Question: can istikhara be done during the day?
Answer: It's advised to incorporate Istikhara into your morning prayer (Salat al-Fajr) or after Salat al-Lail. Salat al-Lail is a voluntary late night prayer. It does not have a mandated number of rak'ah, but if it you perform it, it must be after the obligatory Isha, or night prayer.