Celebration” or “festival” involves three things: place, time and gathering, in any of which things may be innovated.

With regard to time, there are three kinds of innovation, which may overlap with issues of place and actions.

The first kind is a day which is not venerated at all in Sharee’ah, which was not mentioned by the Salaf and nothing happened on that day to indicate that it should be held in any kind of esteem.

The second kind is a day on which some event happened that also happened on other days, but that does not mean that it should be regarded as a special occasion, and the Salaf did not venerate this day.

Whoever does such a thing is imitating the Christians, who took the days of events in the life of Jesus (peace be upon him) as festivals, and the Jews. But festivals are part of Sharee’ah, and whatever has been prescribed by Allah should be followed, but whatever has been innovated in the religion is not a part of Islam.

Similarly, the innovation followed by some people (in celebrating the Prophet’s birthday), whether it is done in imitation of the Christian celebration of the birth of Jesus, peace be upon him, or it is done out of love and respect for the Prophet (peace and blessings of Allah be upon him), is not something which was done by the Salaf, even though the reason for doing it was there and there was nothing to stop them doing it if it was good…

The third kind is days which are venerated by Sharee’ah, such as the day of ‘Aashooraa’, the day of ‘Arafaah and the two Eid days, etc., but the people who follow their own desires innovate things that they think are good but which in fact are wrong and are not allowed – such as when the Raafidis go without water and express grief on the day of ‘Aashooraa’ etc. These are innovated matters which were not prescribed by Allah or by His Messenger (peace and blessings of Allah be upon him) or by any of the Salaf or the members of the household of the Prophet (peace and blessings of Allah be upon him).