Date and Time - First day of the week

The Old Testament reported, that God to create the wourld in six days, on the seventh he reposed. This day is the Sabbath, he is the rest day in the Jewish religion. The Sabbath is the Saturday. In the Christian religion the resurrection day, the first day was declared as the rest day. In the Islamic religion the friday is the rest day.

If we consider to see the rest day as end of the week, then we get tree different first days of the week: Saturday, Sunday, Monday.

Sunday is mostly used as first day of the week. In Europe Monday is mostly used, primarily in business. Saturday is weit widespread in Arabic countries.