I do not celebrate Christmas, Halloween, Easter, Lent, Passover, Feast of Tabernacles, Mid-Autumn Festival, Chinese New Year, etc. I don't even celebrate my birthday. I didn't attend my Bachelor's, Master's, or PhD convocations. Basically, I do not celebrate much but I am happy that others do :)
Romans 14:
Romans 14:
Colossians 3:5 One person considers one day more sacred than another; another considers every day alike. Each of them should be fully convinced in their own mind.
I think it is okay for Christians to celebrate Halloween, Yom Kippur (Day of Atonement), and Rosh Hashanah (Feast of Trumpets). It is up to each one of us to decide guided by our conscience before God. I would not be a party pooper :)17 And whatever you do, whether in word or deed, do it all in the name of the Lord Jesus, giving thanks to God the Father through him.