The 1st day of Christmas is December 25th. It marks the beginning of the Christmas season, when people around the world celebrate the birth of Jesus Christ and the spirit of giving. On this day, many people exchange gifts, decorate their homes with Christmas trees and other decorations, and gather with loved ones to enjoy a festive meal. It is also the day when Santa Claus comes to deliver presents to children worldwide, bringing joy and magic to the holiday season.