is christmas always on sunday

The answer is not as simple as a "yes" or "no," as it depends on which country you live in and how the calendar is organized. In some countries, Christmas falls on a fixed date of December 25th, regardless of the day of the week. However, in other countries, such as the United States, the date of Christmas is determined by the Gregorian calendar, which follows a seven-day week. In this case, if Christmas falls on a Sunday one year, it may not fall on a Sunday the next year.