Christmas is known as a Christian holiday marking the birth of Jesus, but its observance has evolved into a secular celebration embraced by diverse cultures globally. Surprisingly, the earliest Christians didn't commemorate the birth of Christ; they primarily celebrated his resurrection at Easter. The date of his birth remains uncertain, with gospel accounts providing different narratives yet agreeing on Bethlehem as the birthplace.

Traditionally, Christmas wasn't celebrated until the fourth century, influenced by Emperor Constantine's initiatives, leading to public gatherings in churches. Some speculate the feast coincided with pre-existing pagan festivals, particularly the winter solstice.

Modern customs have taken on a life of their own. In Japan, KFC has become a traditional Christmas meal since a 1974 marketing campaign successfully positioned fried chicken as a festive alternative to turkey. As a result, families in Japan often reserve their KFC orders weeks in advance.

St. Nicholas, a 4th-century Bishop from Myra, inspired the contemporary figure of Santa Claus with tales of generosity and miracles. While the U.S. has embraced the jolly Santa, various countries have their own gift-bringers, reflecting local customs. In Greece, St. Basil is the gift-giver, while Icelandic tradition brings the Yule Lads—13 mischievous trolls—who deliver presents in the days leading to Christmas.

Among the many traditions, Christmas trees, which have their roots in 16th-century Germany, symbolize warmth and festivity in homes. Other practices, such as mistletoe hanging and Christmas caroling, have traced their origins to ancient European customs focused on community and connection.

This seasonal occasion continues to blend history with evolving cultural practices, depicting how a religious holiday transformed into a global phenomenon appreciated in varied ways across generations and regions.