is christmas always on a sunday

Christmas is not always on a Sunday, as it falls on a different day of the week every year. The date of Christmas is determined by the Gregorian calendar, which follows a 365-day cycle. The celebration of Christmas is traditionally held on December 25th, regardless of the day of the week it falls on. However, the date of Christmas may vary in countries that follow different calendars, such as the Julian calendar or the Islamic calendar.