The Lord Jesus has made it clear to me that God considers all foods fit to eat. But if you think some foods are unfit to eat, then for you they are not fit.
God's kingdom isn't about eating and drinking. It is about pleasing God, about living in peace, and about true happiness. All this comes from the Holy Spirit.
Don't let anyone tell you what you must eat or drink. Don't let them say that you must celebrate the New Moon festival, the Sabbath, or any other festival.