There is a strong connection between food and drink, and the body and blood of Christ. Not a physical connection, of course, for Christ surely did not condone cannibalism. There is a spiritual connection. As the living Father sent Me, and I live because of the Father, so he who eats Me, he also shall live because of Me. It is called this because it nourishes the soul, just as physical food nourishes the body.
Holidays are important to many people for various reasons.
Children love the ones that give them the day off from school. There are no truly 'holy' days in the calendar year, in the eyes of God. God has commanded man to observe the Lord's Evening Meal, but the only day he made holy was the Sabbath, which became superceded by the new Covenant between God and man. What word is good to replace the word 'holiday' is something the authors of the Bible Probe will leave to conjecture.