Q: What is the ruling on celebrating the passing of the first, second, or more or less years of one's life, i.e. the occasion known as birthday celebration? What is the ruling on attending the banquets served on these occasions? Should a person accept the invitation? May Allah benefit us and you!
Evidence from the Qur'an and Sunnah (whatever is reported from the Prophet) indicates that celebrating birthdays is a Bid`ah (innovation in Islam), which has no origin in Allah's Purified Shar` (Law). It is not permissible to accept invitations to birthday celebrations, because this involves supporting and encouraging Bid`ah.