Welcome to the Lailatul Qadar website. Learn more about the definition of Lailatul Qadar, or read more about its religious significance. Lailatul Qadar, literally the Night of Decree or Night of Measures, is the anniversary of two very important dates in Islam that occurred in the holy month of Ramadhan. The Lailatul Qadar is also known as the Night of Excellence. It is also the anniversary of the night Muslims believe the first verses of the Quran were revealed to the Prophet Muhammad, peace be upon him.