If a woman ends her menses before sunset, she must perform the Zhuhr and ‘Asr prayers

Question: When a menstruating woman becomes pure before sunrise is it obligatory upon her to perform the Maghrib and Isha prayers? Similarly, if She becomes pure before sunset, is it obligatory upon her to perform the Zhuhr and ‘Asr prayers?

Response: If a menstruating or post-partum bleeding woman becomes pure before sunset, it is obligatory upon her to perform both the Zhuhr and ‘Asr prayers according to the strongest opinion among the scholars. Similar is the case if she becomes pure before dawn. In that case, she must perform the Maghrib and Isha prayers. This has been narrated from ‘Abdur-Rahmaan Ibn Anf and ‘Abdullaah Ibn ‘Abbaas. This is the opinion of the majority of the scholars. Similarly, if a menstruating or post-partum bleeding woman becomes pure before sunrise, it is obligatory upon her to perform the Fajr prayer.

And from Allaah is guidance.

Shaykh Ibn Baaz
Fataawa al-Mar.ah