where does the names of the week come from
Names of the days of the week The names of the days of the week in many languages are derived from the names of the classical planets in Hellenistic astrology, which were in turn named after contemporary deities, a system introduced in by the Roman Empire during Late Antiquity. In some other languages, the days are named after corresponding deities of the regional culture, either beginning with Sunday or with Monday. In the international standard ISO 8601, Monday is treated as the first day of the week.
Sunday The international standard ISO 8601 for representation of dates and times, states that Sunday is the seventh and last day of the week.[5] This method of representing dates and times unambiguously was first published in 1988.