It is not permissible for you to
congratulate non-Muslims on their festivals even if (Part No. 1; Page No. 438) they get upset with you or feel you are haughty. It is recommended to endear Islam to them and advise them nicely to accept it. We ask Allah (Exalted be He) to open the hearts of your family to Islam.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.