What is the ruling on congratulating disbelievers on their festivals and participating in them?

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the ruling on saying congratulatory phrases on the occasion of what is called Christmas or the New Year, where some Muslims celebrate this day or congratulate the disbelievers?

Answer:
This is forbidden, and it is not permissible for Muslims to participate in the festivals of the disbelievers, nor to attend them, nor to congratulate them on them, nor to eat from the food prepared for them, nor to give them gifts, nor to accept their gifts on these occasions, because this is aiding them in falsehood, and Allah has named the festivals of the disbelievers as falsehood.
[Those who do not witness falsehood, meaning the festivals of the disbelievers.] It is obligatory for the Muslim to avoid these matters and not to be lenient in his religion or to compromise in his religion. Yes, even the religious innovations among Muslims, such as the Mawlid, it is not permissible for us to participate in them, nor to attend them, nor to congratulate them on them, because they are religious innovations. Yes.