In the current world order, Sunday is the last day of the week, the second day of the weekend, which is between Saturday and Monday, and the first day of the week in some cultures. It is considered a holiday in countries with a Christian tradition, when Christians most often visit the church for common prayer and liturgical rites. The word "Sunday" comes from "do not work", i.e. marks a day when there is no work.
In the Gregorian calendar, no century can begin on a Sunday. In the Jewish calendar, no year can begin on a Sunday. Any month that starts on Sunday will have Friday the 13th.
Position during the week
In many countries, including most of Europe and South America (except Brazil), Sunday is the last day of the week. In other countries, including the United States, it is seen as the first day, a traditional view derived from ancient Jews, Egyptians, Christians and the Holy Roman Empire.
Sunday in Christianity
Sunday is considered holy among almost all Christians and a day of rest and going to church. However, from sunset on Friday to sunset on Saturday is the period that God, by the fourth commandment, determined for the holy day, the day of rest, the Sabbath.
Where Sunday Got Its Name Archived on the Wayback Machine website (March 12, 2006)