*Origin of Mawlid Celebrations*
The milad(celebrating birthday of prophet mohammad(pbuh)) was first introduced by the Shee’ah Faatimids after the three best centuries of Islam.
The next person to do this after them and re-introduce it Was King Al-Mudhaffar Abu Sa‘eed Kawkaboori, the king of Irbil, at the end of the sixth century or the beginning of the seventh century AH, as was mentioned by the historians such as Ibn Khalkaan, and others.