Celebrating the occasion of the birthday of the Prophet (صلي الله عليه وسلم) is forbidden. It is not part of the Sunnah of the Messenger (صلي الله عليه وسلم) or of the Khulafa' ar-Rashideen (رضي الله عنهم أجمعين) who succeeded him. The Prophet (صلي الله عليه وسلم) said: “I urge you to follow my Sunnah and the way of the rightly-guided khaleefahs after me; adhere to it and cling to it firmly. Beware of newly-invented things, for every newly-invented thing is an innovation (bid’ah) and every innovation is a going-astray.” (Narrated by Ahmad, 4/126; al-Tirmidhi no. 2676) If a person does anything in order to draw closer to Allaah which was not done by the Messenger (صلي الله عليه وسلم) or enjoined by him, and was not done by the Khulafa ar-Rashideen (رضي الله عنهم أجمعين) who succeeded him, this action implies that he is accusing the Messenger (صلي الله عليه وسلم) of not explaining the religion to the people, and that he disbelieves in the words of Allaah (سبحانه وتعالى): “This day, I have perfected your religion for you” (5:3) because he is adding something extra and claiming that it is a part of the religion, but the Messenger (صلي الله عليه وسلم) did not bring this.