Originally published in 1926, this book contains a general history of the measurement of time now known as the week. Colson begins with the seven-day cycle devised by the Jews and examines how different theologies gave rise to different names and systems of measurement for each day of the week and how the week eventually became standardised. This book will be of value to anyone with an interest in ancient astronomy and the history of time keeping.
The week is the only truly human invention in the calendar. While it superficially resembles the phases of the moon, it quickly gets out of phase.
The week became common knowledge in the west at around the first century CE. It's possible that the Jews kept a seven-day cycle going for a few centuries BC, but it was only in the first century CE that the custom spread throughout the Roman empire. There it was seen as an exotic fad, but the names of the days caught on, and the seven-day cycle eventually replaced even the Roman eight-day market cycle.
The days are named after the seven planets ( moon, mercury, venus, sun, mars, jupiter, saturn) - but not in that ('natural') order! Colson argues that the _hours_ were associated with the planets in the 'natural' order, and that the days were named for the first hour, which gave the 'week-order' (sun, moon, mars, mercury, jupiter, saturn, sun).
The book (rather more of a short pamphlet) was published in 1926, but remains one of the most cited books on the topic. I read a scan from Project Gutenberg, that wasn't all that great quality.
Published in 1926, this little volume purports to be among the first to study the origin of the week, preceded by only one book nearly a century before. Indeed, the topic is rarely presented because of the dearth of material, and what historical evidence exists, allows some conjecture. This is not to say that nothing conclusive can be stated, but there are questions that remain. My previous reading on this general topic includes Duncan’s Calendar, Webster’s Rest Days, Jordan’s Christianity and the Calendar, and Doig’s New Testament Chronology. Duncan does not give much attention to the week, however, he concurs with Colson that the “planetary” names for the days of the week are in the order that they are because of a technique that assigns a planet to each of the twenty-four hours of a day. The planet that begins the first hour of the day assumes the title of that day. Colson was familiar with Webster’s 1916 book, which assumes that all religious and civil observations have their origin in rudimentary beliefs and customs, and often in the superstitions of barbaric societies. Similarly, Colson does not give credence to the biblical account of the origin of the week or the Sabbath. But at the same time, none of the naturalistic theories seem to resonate with him, and he asserts instead that the origin of the Jewish week is lost to antiquity. But it is interesting that no archaeological and anthropological studies have uncovered any alternative theory than what is already presented in the biblical narratives. What we do know is that Rome had an eight-day week. Egypt had a ten-day week and classical Greeks had none. Various other societies had “weeks” of 3, 4, 5, 6, 8, and 10 days, but not necessarily as cycles of weeks. The oldest evidence of a seven-day week is with Judaism, and it appears that Rome adopted its seven-day week in the first century AD. But Colson curiously thinks this originated independently of Jewish influence. Etymological studies demonstrate that host nations subject to Roman rule adopted the Roman nomenclature for the most part, since commerce, military operations, and political events required it. In a few instances, as a result of the spread of Christianity, Saturday and Sunday gave way to Sabbata and Domingo. But this still doesn’t explain why an unchanging seven-day cycle should become the status quo within a luni-solar calendar, and especially with peoples who are not necessarily accustomed to Judaism. This book is interesting to read as the author considers and interprets his findings in Greek and Roman literature. He is familiar with Scripture, but is selective in what he considers as evidence. Does he make the same conclusions I would with the same evidence? Often yes, but not always. Regarding the naming of the Lord’s Day for Sunday, he favorably states, “I see no reason to go outside Christian thought to account for the name Lord’s-day.” He muses that a celebration of the resurrection would naturally be an annual event, but because Christianity was initially a Jewish movement that grew to encompass Gentiles, and that both cultures operated in seven-day cycles, it was natural that Christianity maintained the weekly cycle. However, he specifically discounts apostolic authority for its continuation. I agree with his assertion that when early Christians assembled on the 7th +1 day instead of on the 7th, it was not keeping the Sabbath. However, I disagree with his conclusion that the abrogation of the Sabbath destroyed the reason for the week. In my opinion, the week, or seven-period, is divine in origin. The weekly Sabbath unified Israel under the Mosaic covenant and the weekly Lord’s Day unifies the church under the New Covenant. Shifting the day of assembly maintained the weekly cycle and caused no calendar upset, yet conclusively broke the grip of the Sabbath on New Covenant believers.