Answered by Shaykh Sohail Hanif, SunniPath Academy Teacher
I normally have my period for four days. On the fourth day I normally bleed at night but I am clean in the day. If I refrained from prayers of isha and taraweeh thinking that previously this is how my cycle works but the next day I find that I was wrong should I make up those prayers I missed?
If one’s menstrual bleeding stops before the end of a particular prayer time leaving one with enough time to perform the ritual bath and commence that prayer then one is responsible for that particular prayer. (Radd al-Muhtar) Should one not perform that prayer then one must make it up. One must therefore make up the isha prayer that was missed as well as the witr prayer. Sunna prayers are not made up after their time has elapsed so one need not worry about making up for the missed taraweeh prayers.
It is a major sin to miss an obligatory prayer intentionally. One must learn the fiqh of menstruation so as to avoid falling into this sin.
May Allah increase us in knowledge of that which benefits us.