why do people say xmas

Oh, that's an interesting question! The word "xmas" is a shortened version of "Christmas." The "x" in "xmas" is a symbol used in ancient Greece to represent the Greek word "chi," which is the first letter in the Greek word "Christos," which means "Christ." So, when people say "xmas," they're actually referring to Christmas in a more abbreviated form. It's a way to save time and space when writing or speaking, and it's also become a more commonly accepted practice over the years.