Miladun Nabi (Birthday of Prophet SAW) Celebration

Did Prophet or his companions celebrate his birthday? NO,

Did the 4 imaams and other scholars celebrate his birthday? NO

Does the Quran or sunnah specifically mention about celebrating his birthday? NO

Started ~600 years after hijrah 

The Prophet (blessings and peace of Allah be upon him) told us that: “Every innovation is going astray, and every going astray will be in the Fire.” Narrated by Muslim (867) and an-Nasaa’i (1578)

The Prophet (peace and blessings of Allaah be upon him) stated repeatedly that: "Every newly-invented thing is a bid'ah (innovation), every bid'ah is a going astray, and every going astray will be in the Fire." (Reported by al-Nisaa'i in al-Sunan, Salaat al-'Eedayn, Baab kayfa al-Khutbah). Reports with the same meaning were narrated via Jaabir (may Allaah be pleased with him) by Ahmad, via al-'Irbaad ibn Saariyah by Abu Dawud and via Ibn Mas'ood (may Allaah be pleased with him) by Ibn Maajah.

The Prophet (peace and blessings of Allaah be upon him) used to say, when beginning a khutbah (sermon): " The best of speech is the Book of Allaah and the best of guidance is the guidance of Muhammad. The worst of things are those which are newly-invented, and every innovation is a going astray" (reported by Muslim, no. 867)

The Prophet (peace and blessings of Allaah be upon him) stated that whoever innovates something new in the deen (religion) will have his deed rejected, and Allaah will not accept it, as is stated in the hadeeth narrated by 'Aa'ishah (may Allaah be pleased with her), who said: "The Messenger of Allaah (peace and blessings of Allaah be upon him) said: 'Whoever innovates something in this matter of ours that is not a part of it will have it rejected.'" (Reported by al-Bukhaari, Fath al-Baari, no. 2697).