Kursī (which means chair, but possibly failed to initially make reference to that in context; the origin and indicating are not known, but it may be translated as "enthronement") usually starts on Thursday and lasts seven times. It's the longest and most elaborate ceremony. The laylat al-hinna is on https://official-music00909.bloggazzo.com/30002861/new-step-by-step-map-for-zar-music