Celebrating Birthdays and Eating Their Food

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the ruling on eating, what is the ruling on celebrating birthdays, and what is the ruling on eating from the food of this specific birthday that was brought for the occasion, knowing that his family celebrates it. Every individual from the family and others from the other holidays, and I have advised them many times, and they know that it is not permissible, but they insist on it, and they buy gifts. So, is it permissible for me to eat with them and take the gifts?

Answer:
The pre-Islamic and forbidden holidays: it is not permissible to participate in them, nor to eat the food served in them, nor to assist them in holding them, nor to attend them. One must cut them off completely. One does not eat from their food, does not attend them, and does not help them with money to hold them, because this is cooperation in sin and aggression, and it is an approval of what is wrong, so this is not permissible. Yes.