<P> In Russian the word for Sunday is Воскресенье (Voskreseniye) meaning "Resurrection". In other Slavic languages the word means "no work", for example Polish: Niedziela, Ukrainian: Недiля, Belorussian: Нядзеля, Croatian: nedjelja, Serbian and Slovenian: Nedelja, Czech: Neděle, and Bulgarian: Неделя . </P> <P> The Modern Greek word for Sunday, Greek: Κυριακή, is derived from Greek: Κύριος (Kyrios, Lord) also, due to its liturgical significance as the day commemorating the resurrection of Jesus Christ, i.e. The Lord's Day . </P> <P> The international standard ISO 8601 for representation of dates and times, states that Sunday is the seventh and last day of the week . This method of representing dates and times unambiguously was first published in 1988 . </P> <P> In the Judaic, some Christian, as well as in some Islamic tradition, Sunday has been considered the first day of the week . A number of languages express this position either by the name for the day or by the naming of the other days . In Hebrew it is called יום ראשון yom rishon, in Arabic الأحد al - ahad, in Persian and related languages یکشنبه yek - shanbe, all meaning "first". In Greek, the names of the days Monday, Tuesday, Wednesday, and Thursday ("Δευτέρα", "Τρίτη", "Τετάρτη" and "Πέμπτη") mean "second", "third", "fourth", and "fifth" respectively . This leaves Sunday in the first position of the week count . The current Greek name for Sunday, Κυριακή (Kyriake), means "Lord's Day" coming from the word Κύριος (Kyrios), which is the Greek word for "Lord". Similarly in Portuguese, where the days from Monday to Friday are counted as Segunda - feira, Terça - feira, Quarta - feira, Quinta - feira and Sexta - feira, while Sunday itself similar to Greek has the name of "Lord's Day" (Domingo). In Vietnamese, the working days in the week are named as: "Thứ Hai" (second day), "Thứ Ba" (third day), "Thứ Tư" (fourth day), "Thứ Năm" (fifth day), "Thứ Sáu" (sixth day), "Thứ Bảy" (seventh day). Sunday is called "Chủ Nhật", a corrupted form of "Chúa Nhật" meaning "Lord's Day ." Some colloquial text in the south of Vietnam and from the church may still use the old form to mean Sunday . </P>

When did sunday became the seventh day of the week