The ruling on having a Celebration for naming the newborn Child
Question :
Is it permissible for the loved ones, neighbors and friends to gather for the naming of the newborn child or is that celebration an innovation and disbelief?
Answer:
Having a party for naming the newborn child is not from the Sunnah of the Prophet and it did not occur among his Companions during his time. So, whoever does that thinking that it is an Islamic Sunnah, then he has invented into the religion that which is not a part of it. Thus, that is an innovation from him that is rejected. This is due to the statement of the Messenger of Allâh:
"Whoever introduces into this religion of ours that which is not from it, it is rejected."
However, it is not disbelief. In reference to whoever does it out of happiness and delight or for the sake of partaking of the food of the 'Aqeeqah, and not thinking that it is Sunnah, there is no harm in that. Indeed it has been confirmed from the Prophet ﷺ that which proves the legislation of slaughtering the 'Aqeeqah animal on the 7th day and naming the newborn child (on that day).
Source:
The Permanent Committee
Fatawa Islamiyah, Vol. 4 Pages 344-345