There is a special night during Ramadhan called the Lailatul al-Qadr, the Night of Power.
Among the nights of Ramadhan is one special night, which is better than a thousand months (HQ, 97:3). Good deeds performed on that single night are equal to those performed over a thousand months. It is the Night of Power (Laylatul Qadr), when the Qur’an was revealed. Some commentators believe it was the night when the Qur’an was brought down from Baytul M`amur (Heavenly abode), for Jibrael to reveal in parts to the Prophet (s). Others say it was the night when the Prophet received the entire Qur’an, but was asked to transmit it as and when the occasion demanded.
No one knows for sure which of the 30 nights is the Night of Power, and perhaps it even changes every Ramadhan. It could be tonight, it could have already passed, or it might be tomorrow or the day after. In the future, one day, when the ravages of a young life no longer demand divisions of my time, i will pray terawih and qiyamulail (prayers that last the whole night) all 30 nights of Ramadhan. That is the only sure way not to miss it.