Congratulations on the New year (Muharram) Or the occasion of Mawlid (the Prophet’s birthday)

Question 1: Is it permissible to congratulate non-Muslims on the occasion of the new Gregorian year, the new Hijree (lunar) year, and the Mawlid (the Prophet’s birthday)?

Answer: It is not permissible to offer congratulations on such occasions; for it is not Mashroo‘ (Islaamically permissible) to celebrate them… read more here.