when do they perform???????

i saw govinda dancing with ankita when do they shoot all this and how much time do contestants get to rehearse. i thought this all happens on friday.i am confused 😕 because its not friday yet and they have next gala shooted already........ please help. 😊

usually nxt gala is shot right after the saturday episode where sum contestant gets out... (m not sure wen exactly but its way b4 friday)