Kindly refer to the following link(s):
Muslims celebrating non-Muslim festivals | Sheikh Assim Al Hakeem
Accepting gifts on Christmas, New Year, Diwali etc.
Eating food items as gifts from non-Muslims festivals (Diwali)
Can Muslims eat and accept gifts from non muslims on their Christmas/Diwali?
Eating food of innovated festivals like Mawlid, Muharram, Khatam etc
Congratulating non-Muslims on Christmas, New Year and other festivals?
Greeting New Year Merry Christmas, Thanksgiving Halloween, Diwali
If someone wishes Happy valentine what to reply back
14th Feb Valentines Day | By Sheikh Assim Al Hakeem
Celebrating Birthdays, New years, Mother's Day, Father's Day etc