Why do people sometimes refer to Christmas as “Xmas”? The Greek word for “Christ” is “Christos”; “Ch” in Greek is the letter X (pronounced kai). “Xmas” therefore can be a short form of “Christos-mas” or “Christmas.”
In the Old Testament, the “name” of God denotes His presence and personality, His character and power. God told Moses that His name is Yahweh, which means “the One who was, is, and ever shall be.” God’s people are invited to know and trust the eternal, never-changing, omnipresent Lord of the universe.