A friend of mine posted some hadith and said that the Prophet celebrated his own birthday. It is from sahih muslim vol2, book of Sawm, Hadith no. 1162. Is this authentic hadith?
In Biography of the Prophet salla Allahu alahi wa sallam
Dec 27th, 2015
This is baseless. He was born on Monday and he was fasting that day. He never fasted 12 of rabee al awwal, neither did his companions!
Those who want to celebrate it may fast every Monday if they are truthful!