✔ 最佳答案
In early Greek versions of the New Testament, the letter Χ (chi), is the first letter of Christ (Χριστός). Since the mid-sixteenth century Χ, or the similar Roman letter X, was used as an abbreviation for Christ.
所以X就即是等於Christ.
正確地說,不是x'mas,而是沒有 ' ,是xmas,因為x已代表了christ。