Layla tul Qadr falls on the 23rd of Ramadan and this is significant event in Muslim history as not only did Prophet Muhammad (pbuh) receive his first revelation that culminated in the Holy Quran, but this day marks the anniversary of his Prophethood on earth. Muslims all over the world spend this night in prayers as it holds special Barakah for those in prayer.
“In the name of God, the Beneficent the Merciful
“Indeed We sent it [the Holy Quran] down on the Night of Power. What will convey to you what the Night of Power is? Better is the Night of Power than a thousand months. In that Night the angels and the Spirit descend by the permission of their Lord for every errand. Peace it is, until the break of dawn.”
– Quran, Chapter 97 Al-Qadr
More http://www.amaana.org/ismaili/layla-tul-qadr-the-night-of-power/.