Final answer:
The most popular Christmas saying is "Merry Christmas," a universal message of goodwill and cheer during the holiday season.
Step-by-step explanation:
The most popular Christmas saying is often considered to be "Merry Christmas". This greeting encapsulates the good cheer and warm wishes associated with the festive season. Integrating this saying into the broader context of Christmas, it's clear that this phrase goes beyond its religious roots to become a secularized expression of joy and celebration. Families and friends commonly exchange this saying, regardless of their cultural or religious backgrounds, making it a universal message of goodwill during the holiday season.
Additionally, the holiday season is filled with a variety of traditions and stories, including those about Santa Claus and his magical ability to deliver gifts to children around the world. Although the belief in Santa Claus fades as children grow older, the spirit of giving and receiving gifts remains an integral part of Christmas celebrations.