Translation: Indeed, We sent it down in the Night of Power. What will explain to you what the Night of Power is? The Night of power is better than a thousand months; the angels and the spirit descend therein by permission of their Lord for every matter. [There is] peace until the break of dawn. (Quran, 97; 1-5)
Lailatul Qadr, the Night of Power, marks the night in which the Quran was first revealed to the prophet Muhammad. Muslims regard this as one of the most important events in history and during it, many stay up until darn, praying and reading the Quran.