The “Night of Power” is a chance for Muslims to remember the night the Quran was first revealed to the Prophet Muhammad.
When Is Laylat Al Qadr?
The Prophet Muhammad did not mention exactly when the Night of Power would be, although most scholars believe it falls on one of the odd-numbered nights of the final ten days of Ramadan, such as the 19th, 21st, 23rd, 25th or 27th days of Ramadan. It is most widely believed to fall on the 27th day of Ramadan.
The Quran says in Surat Al-Qadr:
We have indeed revealed this (Message) in the Night of Power:
And what will explain to thee what the night of power is?
The Night of Power is better than a thousand months.
Therein come down the angels and the Spirit by Allah’s permission, on every errand:
Peace!… This until the rise of morn!
The importance of this night is also mentioned in hadith, which are the sayings of the Prophet Muhammad as remembered by his companions:
Whoever establishes the prayers on the night of Qadr out of sincere faith and hoping to attain Allah’s rewards (not to show off) then all his past sins will be forgiven.
Hadith, Bukhari Vol 1, Book 2:34.