Are good deeds considered unacceptable if performed after the beginning of the prayer time and before the prayer is offered, even if the prayer is performed before its time expires?

Prayer is an extended obligation, so it is permissible to perform it at any part of its designated time. A person does not sin by delaying it from its very beginning, even if they perform another good deed instead. The obligation upon them is to perform it before the time expires, and there is no harm in performing it at any part of its time. However, performing it at the beginning of its time is better, except for what has been specifically exempted.