Christmas is a Christian holiday that celebrates the birth of Jesus Christ. It is observed on December 25th in most countries around the world, including the United States. In 2025, Christmas will fall on a Thursday.
The date of Christmas was first established in the 4th century AD by Pope Julius I. He chose December 25th because it coincided with the pagan Roman festival of Saturnalia, which was a time of feasting and merrymaking. Christmas has been celebrated on December 25th ever since, although the traditions and customs associated with the holiday have varied over time and from country to country.