Is it permissible for Muslims to participate with non-Muslims in their holidays, such as Christmas?

It is not permissible for a Muslim to participate with disbelievers in their holidays, nor to show joy in them, nor to suspend work, because this constitutes unlawful imitation of the enemies of Allah and cooperation with them in falsehood. This is based on the Prophet's (peace and blessings be upon him) saying: "Whoever imitates a people is one of them," and on Allah's Almighty saying: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression."