According to the Hebrew calendar and traditional Christian calendars, Sunday is the first day of the week. But according to the International Organization for Standardization ISO 8601, Sunday is the seventh day of the week.
The Bible does not use the word “sunday” for the first day of the week. That is a pagan concoction to honor their sun god, just as monday is moon-day and so on. That is history. At no time or place in the bible was the first day of the week blessed, hallowed, sanctified, or set aside as special in any way.
We should observe the seventh day of the week (Saturday), from even to even, as the Sabbath of the Lord our God. Evening is at sunset when day ends and another day begins. No other day has ever been sanctified as the day of rest. The Sabbath Day begins at sundown on Friday and ends at sundown on Saturday.
According to the Hebrew calendars and traditional Christian calendars, Sunday is the first day of the week. However, according to the International Organization for Standardization ISO 8601, Sunday is the seventh and last day of the week.
Roman Emperor Constantine I
However, the simple answer is that most wall calendars (in the United States) show Saturday as the 7th day of the week. In fact, the Roman Catholic Church, which has been doing business for well over a thousand years, still refers to Sunday as the first day of the week.
The Babylonians, who lived in modern-day Iraq, were astute observers and interpreters of the heavens, and it is largely thanks to them that our weeks are seven days long. The reason they adopted the number seven was that they observed seven celestial bodies — the Sun, the Moon, Mercury, Venus, Mars, Jupiter and Saturn.
The name is derived from Old English Þūnresdæg and Middle English Thuresday (with loss of -n-, first in northern dialects, from influence of Old Norse Þórsdagr) meaning "Thor's Day". It was named after the Norse god of Thunder, Thor.
The ancient Etruscans developed an eight-day market week known as the nundinum around the 8th or 7th century BC. This was passed on to the Romans no later than the 6th century BC. As Rome expanded, it encountered the seven-day week and for a time attempted to include both.
Monday gets its name from the Anglo-Saxon word "mondandaeg" which translates to "the moon's day." The second day of the week in Nordic cultures was devoted to worshipping the goddess of the moon. Girls born on Mondays were given the name Mona in Ancient Britain, as it was the Old English word for moon.
A month is a unit of time, used with calendars, which is approximately as long as a natural period related to the motion of the Moon; month and Moon are cognates. The traditional concept arose with the cycle of Moon phases; such months' (lunations) are synodic months and last approximately 29.53 days.
Calendars mostly show Sunday as the first day of the week. Some other calendars and most other weeks instead treat Monday as the first day of the week.
Biblical Sabbath is a weekly day of rest or time of worship given in the Bible as the seventh day. It is observed differently in Judaism and Christianity and informs a similar occasion in several other faiths.
According to the Book of Exodus, the Sabbath is a day of rest on the seventh day, commanded by God to be kept as a holy day of rest, as God rested from creation. The practice of observing the Sabbath (Shabbat) originates in the biblical commandment "Remember the sabbath day, to keep it holy".
Origins of Sunday worship
In the 2nd century the church of Rome lacked jurisdictional authority to impose a novel universal change of Sabbath rest from the seventh day to the first, or to obtain universal Sunday worship had it been introduced after the Christian church had spread throughout the known world.Every week religious Jews observe the Sabbath, the Jewish holy day, and keep its laws and customs.
The name Friday comes from the Old English Frīġedæġ, meaning the "day of Frige", a result of an old convention associating the Germanic goddess Frigg with the Roman goddess Venus, with whom the day is associated in many different cultures.
According to the Book of Exodus, the Sabbath is a day of rest on the seventh day, commanded by God to be kept as a holy day of rest, as God rested from creation. The practice of observing the Sabbath (Shabbat) originates in the biblical commandment "Remember the sabbath day, to keep it holy".
Saturday is the day of the week between Friday and Sunday. The Romans named Saturday Sāturni diēs ("Saturn's Day") no later than the 2nd century for the planet Saturn, which controlled the first hour of that day, according to Vettius Valens.
The days were named after the planets of Hellenistic astrology, in the order: Sun, Moon, Mars (Ares), Mercury (Hermes), Jupiter (Zeus), Venus (Aphrodite) and Saturn (Cronos). The seven-day week spread throughout the Roman Empire in Late Antiquity.
The Sabbath. The Jewish Sabbath (from Hebrew shavat, “to rest”) is observed throughout the year on the seventh day of the week—Saturday. It appears that the notion of the Sabbath as a holy day of rest, linking God to his people and recurring every seventh day, was unique to ancient Israel.
Saturday is the day of the week between Friday and Sunday. The Romans named Saturday Sāturni diēs ("Saturn's Day") no later than the 2nd century for the planet Saturn, which controlled the first hour of that day, according to Vettius Valens.
The international standard makes the week begin on Monday
SIR – It is difficult to find calendars with Sunday as the first day of the week (Letters, November 2) because it no longer is. Some years ago, the International Organisation for Standardisation specified Monday as the first day.Opening hours and bank holidays. Banks: from 8 am to 2 pm, Monday to Saturday. Shops: from 8 am to 9 pm, Monday to Saturday; some supermarkets open on Sunday.
Tuesday gets its name from the Anglo-Saxon's god of war Tiu, also known as Tyr to the Vikings. The Romans named their third day of the week after their god of war, Mars. That is why romantic languages like Spanish, French and Italian all have similar names for Tuesday: martes, mardi, and martedi.