During the last ten days of Ramadan , larger mosques will host all-night programs to observe Laylat al-Qadr . It is the night Muslims believe that the Islamic prophet Muhammad first received Qur ` anic revelations . During the last ten days of Ramadan , larger mosques will host all-night programs to observe Laylat al-Qadr , the night Muslims believe that Muhammad first received Qur ` anic revelations .