Q. I had my menses after the Zuhr time started and before I read my Zuhr Salaah and before the Zuhr time finished. Do I have to make Qadha of this Zuhr Salaah after I become clean?
A. The termination of a Salaah time determines the obligation/non-obligation of Salaah in accordance to a person’s circumstance.
In the enquired situation, at the termination of the Zuhr Salaah time, you were in the state of menstruation (Haidh). Accordingly, it will not be necessary for you to make up the Zuhr Salaah as the performance of Salaah in such a state is not obligatory. (Shaami 2/131)
Allah Ta’ala Knows Best
Mufti Ismaeel Bassa