Celebrating the Prophet’s birthday was not prescribed by Allaah or by the Messenger of Allaah (peace and blessings of Allaah be upon him), so it is not permissible for the Muslims to celebrate his birthday, in obedience to the command of Allaah and the command of His Prophet (peace and blessings of Allaah be upon him).
( Islam QA, See http://islam-qa.com/en/ref/13810 for details)
The Prophet (peace and blessings of Allaah be upon him) said: “I urge you to adhere to my Sunnah [way] and the way of the Rightly-Guided khaleefahs. Adhere to it and cling tightly to it. And beware of newly-invented matters [in religion], for every newly-invented matter is an innovation and every innovation is a going-astray.” (Narrated by Abu Dawood, al-Sunnah, 3991; classed as saheeh by al-Albaani in Saheeh Abi Dawood, no. 3851).
May Allah guide us all to the straight path. Ameen.
