Celebrating with Christians in their feasts

Q 3: Is it permissible for Muslims to accept the Christians' invitations to their parties and occasions and vice versa?

A: It is not permissible to share in the festivals and religious celebrations held by non-Muslims, for Allah, the Exalted, described the Servants of the Most Beneficent (Allâh) as And those who do not bear witness to falsehood The word "falsehood" is interpreted as "the disbelievers' festivals," and "bear witness" [in Arabic "yash-hadun;" which could mean "bearing witness" or "attending, partaking, etc."] is interpreted as (Part No. 1; Page No. 453) "attending and participating in them."May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.