The date of Nuzul Al-quran varies because it is based on the Islamic Hijri Calendar. The day is on day number 17 in the islamic month ramadan.
The Islamic Hijri Calendar is a lunar calendar, which means that the calendar depends on the lunar phases. This means that, in the next ten years, Nuzul Al-quran varies between January 11 and December 20. In the table below you can see the date for Nuzul Al-quran in the coming years in the western calendar (Gregorian calendar).
