It Took a Hundred and Twenty-One Years to Win the Forty-Hour Week.
Load · The Britannica Series, Vol. 8 · 12 min read · who actually won it, the dated record from 1817, and why the boundary they built no longer holds your evening
Built on the assessment of four labour historians in a published fact-check, and on the work of Juliet B. Schor, PhD, Professor of Sociology at Boston College, whose The Overworked American opened the modern argument about working hours. Boston College faculty page · her curriculum vitae · Radcliffe Institute profile · Britannica
Nobody gave anybody the weekend. It was argued for across four generations, people were killed over it, and then it was quietly handed back through a phone.
It is ten past nine and you have opened the laptop again. Not for long. There was one thing, and answering it now means not thinking about it in bed, which is the trade you make most nights and which you would not describe as working.
Somewhere behind that is a rule you were raised on. Forty hours. Nine to five. You have not worked nine to five since roughly 2011, and nobody announced the change, and nobody asked you to sign anything. So it is worth knowing who invented the 40 hour work week, because the answer explains both why you believe in the boundary and why it stopped protecting you. This is a reading of published history, a fact-check that consulted four labour historians, and the economics of working hours. We are not historians. The findings belong to the researchers and institutions named and linked below, and the plain-English version is ours.
The short answer: not Henry Ford, though page one of a search still says so. A fact-check that consulted labour historians at Cornell, the University of Illinois, Sarah Lawrence and Rutgers rated the Ford claim Mostly False and concluded that labour unions rather than Ford deserve the primary credit.¹ The dated record runs from Robert Owen’s slogan in 1817, through the 1866 Geneva congress, the Illinois law of 1867, the general strike of 1 May 1886 and the Haymarket bombing three days later, the Adamson Act for railroad workers in 1916, and Ford’s own eight-hour shift in January 1914 and five-day week in 1926, to the Fair Labor Standards Act signed in 1938.¹ ² ³ Roughly a hundred and twenty-one years from the slogan to the statute. It has taken about fifteen years to undo it, and no statute was involved.
The skim version
- 1817. Robert Owen’s slogan: “Eight hours’ labour, Eight hours’ recreation, Eight hours’ rest.”² A hundred and twenty-one years before it became American law.
- 1 May 1886. Albert Parsons led 80,000 workers down Michigan Avenue in Chicago. Within days 350,000 workers struck at 1,200 factories.² The Haymarket bombing followed on 4 May.³
- January 1914. Ford doubled pay to five dollars a day and cut shifts from nine hours to eight. The five-day week came in 1926.¹ ² Both are real, and both came after decades of organised pressure.
- 1938. The Fair Labor Standards Act. Sources disagree on the starting number: the fact-check says 44 hours, stepping to 40 by 1940. Wikipedia’s summary says 40 from the outset.¹ ² Both are printed here.
- 1930 to 1985. Kellogg in Battle Creek ran a six-hour day for fifty-five years, from 1 December 1930 until the last department gave it up.⁴
- The honest part: hours did fall. Nicholas Crafts calculated that British men’s annual hours fell by about a quarter between 1931 and 2011, to around 1,840. Keynes had predicted a two-thirds fall, to about 780.⁵ The boundary problem is not that we work Victorian hours. It is that the hours no longer have edges.
In this article: Why everyone says Ford · The dated record, 1817 to 1940 · The fifty-five year experiment nobody mentions · Three centuries of the end of the day · Where the boundary went · Questions people ask
Why everyone says Ford, and what a fact-check found
Search the question and the first page is almost unanimous. A human-resources blog, a four-day-week advocacy site, a widely shared professional post, several hundred comments on a forum: Henry Ford, 1926, discovered through research that shorter hours produced as much output, and the country followed.
It is a good story because it has one man, one date and a counterintuitive discovery. It is also, when checked, mostly wrong. PolitiFact examined the claim and rated it Mostly False, consulting Ileen A. DeVault of Cornell University, Robert Bruno of the University of Illinois School of Labor and Employment Relations, Priscilla Murolo of Sarah Lawrence College, David Bensman of Rutgers, and a curator at the Henry Ford Museum. Their conclusion was that labour unions, rather than Ford, deserve the primary credit.¹
Ford’s actions were real. On 5 January 1914 he doubled wages to five dollars a day and cut shifts from nine hours to eight, and competitors followed.² In 1926 he moved to a five-day week.¹ What he did not do was originate the idea, win the political fight, or make it law. He adopted, profitably and publicly, a demand that had been on the table since before his grandfather was born.
This matters for a reason beyond accuracy. If one industrialist invented the forty-hour week as a productivity insight, then the boundary around your working day is a management technique, and management may withdraw it. If it was won across a century by people who organised, struck and in some cases were hanged for it, then it is a right, and rights are a different category of thing to lose.
If you are reading this at an hour that is technically your own, and the reason is a boundary that dissolved without anyone deciding, that is worth ten quiet minutes on its own terms. Start here.
The dated record, 1817 to 1940
1817. Robert Owen, the Welsh mill owner and reformer, formulates the goal and the slogan that carries it: “Eight hours’ labour, Eight hours’ recreation, Eight hours’ rest.”²
1866. The International Workingmen’s Association congress in Geneva declares that legal limitation of the working day is a preliminary condition for any improvement in workers’ lives, and proposes eight hours as the legal limit.²
1867. Illinois passes an eight-hour law with enough loopholes to make it largely ineffective. A federal law covering certain workers follows in 1868, also poorly enforced.¹ ²
1 May 1886. Albert Parsons leads 80,000 workers down Michigan Avenue in Chicago demanding an eight-hour day with no cut in pay. Within days, 350,000 workers are on strike at 1,200 factories.² On 4 May a bomb is thrown during a labour rally at Haymarket Square and the confrontation that follows becomes the Haymarket Affair, which has been associated with May Day since its designation as International Workers’ Day in 1889.³
1914 and 1916. Ford’s eight-hour shift in January 1914.² The Adamson Act in 1916 establishes an eight-hour day for railroad workers, the first federal regulation of hours in private companies.²
1938. Franklin D. Roosevelt signs the Fair Labor Standards Act. Here the sources part company. The fact-check, working with labour historians, states the act began at 44 hours a week and phased down to 40 by 1940.¹ Wikipedia’s summary of the movement says it established a 40-hour maximum in covered industries from enactment.² We have printed both because it is a real disagreement between a fact-check and a reference work, and because a reader who wants the definitive text can go to the Department of Labor’s own history of the act.
A hundred and twenty-one years from a slogan in a Welsh mill town to a signature in Washington. Nobody discovered it. People spent four generations insisting on it.
What the research found
Hours did fall, and less than anyone expected. In 1930, John Maynard Keynes predicted that by 2030 people would be working about fifteen hours a week, which is roughly 780 hours a year.⁵ Nicholas Crafts, the economic historian, tested that prediction against the record. Between 1931 and 2011, working hours fell by roughly a quarter, not the two-thirds Keynes expected, and men in 2011 averaged about 1,840 hours a year.⁵
The finding that complicates it. Measured across a whole lifetime rather than a week, expected lifetime leisure and home production rose 58.4 per cent between 1931 and 2011, which slightly exceeds what Keynes would have predicted. Leisure alone rose 42.4 per cent, well short of it.⁵ The gains arrived as longer retirements and longer lives rather than as shorter Tuesdays.
The limitation: the whole field rests on two methods that disagree. Juliet Schor argued in The Overworked American that Americans were working 163 hours a year more than in the 1960s, using Bureau of Labor Statistics estimates.⁶ John Robinson and Geoffrey Godbey used time diaries from more than 10,000 Americans and concluded the opposite, that free time had risen and work hours fallen: women from about 37 hours a week in 1965 to 31 in 1985, men from 47 to under 40.⁶ Recalled hours and diary hours are not the same measurement, people overstate long weeks when asked, and nobody has fully reconciled the two. Anyone who tells you this question is settled has read one side.
The source for this piece
Juliet B. Schor, PhD
Professor of Sociology, Boston College, and previously on the faculty at Harvard. Author of The Overworked American: The Unexpected Decline of Leisure, Basic Books, 1992, the book that put working hours back into public argument, and a fellow of the American Association for the Advancement of Science. Her doctorate is in economics, not medicine, and nothing in this article is a clinical judgement.
What we read: her Boston College faculty page and curriculum vitae, contemporaneous reporting of the dispute between her figures and the time-diary researchers, the PolitiFact fact-check of the Ford claim with its four historians, and the published record of the eight-hour movement.¹ ² ⁶
Where to follow her work: Boston College Sociology · her CV · Radcliffe Institute
The fifty-five year experiment nobody mentions
On 1 December 1930, the Kellogg company in Battle Creek, Michigan, moved to a six-hour day. It was an instant success and drew national attention.⁴
W. K. Kellogg’s stated reason was personal in a way that reads oddly now. He had never learned to play, and did not want that for his workers. In old age he funded recreational projects and encouraged employees to use their spare time on worthwhile activities.⁴
During the Second World War the company went to a forty-eight hour week and promised to return to six-hour shifts when the emergency ended. It partly did. The experiment then eroded department by department over four decades until, in 1985, the last department went to eight hours and it was over.⁴
The historian who documented it is Benjamin Kline Hunnicutt, Professor at the University of Iowa since 1975, in Kellogg’s Six-Hour Day, Temple University Press, 1995.⁴ ⁷ His larger argument across four books is that the twentieth century abandoned shorter hours as a goal and replaced it with the right to work more, and that this was a choice rather than an inevitability.⁷
Fifty-five years is not a pilot scheme. It is a working lifetime. It is the best evidence available that a shorter day is operationally possible, and it is almost entirely absent from the page-one story about Henry Ford.
Three centuries of the end of the day
| 19th century | 20th century | 21st century | |
|---|---|---|---|
| What ended the day | Daylight, and the foreman | A whistle, a clock, and after 1938 a statute¹ | Nothing. You decide, nightly, and you are bad at it |
| Who set the limit | Nobody. Owen proposes one in 1817 and is ignored² | Unions, strikes, and eventually Congress¹ ² | Your own judgement at ten past nine |
| The cost of winning it | Haymarket, 4 May 1886³ | Seventy more years of organising to a statute¹ | Nobody fought to give it back. It simply stopped applying |
| Hours worked | Ten to fourteen a day, six days | Falling about a quarter across 1931 to 2011⁵ | Fewer on paper, unbounded in practice |
| What was predicted | Machines would free everyone | Keynes, 1930: fifteen hours a week by 2030⁵ | About 1,840 hours a year, and a phone⁵ |
| Attention on one screen | Not applicable | Two and a half minutes, measured in 2004⁸ | 47 seconds, median 40⁸ |
They won a boundary. We inherited a preference.
Where the boundary went
The forty-hour week was never a description of how much work existed. It was a fence, and a fence needs two things: a line, and somebody who notices when you cross it.
The line survived. The noticing did not. Nobody in your organisation is counting your hours after six, there is no whistle, and the work that follows you home does not look like work. It looks like a message.
Gloria Mark, Chancellor’s Professor of Informatics at the University of California, Irvine, has been measuring what this does to a working day for twenty years. In 2004 she and Victor González found people spent about two and a half minutes on a screen before shifting. In recent years the average is 47 seconds, with a median of 40.⁸ Her research also finds people checking email an average of 77 times a day.⁸
Put those next to the 1886 demand and something clarifies. What the eight-hour movement was actually defending was not a number of hours. It was the existence of a time that was not the employer’s. The fence was around attention, and attention is what has been quietly rezoned.
What this actually changes
Nothing about your workload. One thing about where you file the problem.
The story you have probably absorbed is that boundaries are a personal skill. Good people at boundaries switch off. You are not good at it, so you check at ten past nine, and that is a fact about your character.
The record says the opposite. For a hundred and twenty-one years, nobody expected an individual to hold that line alone. It was held by a whistle, a union, a contract and finally a federal statute, precisely because it was understood to be too hard for one tired person to hold by willpower at the end of a long day. That understanding was the whole point.
You are being asked to do personally, nightly, with no support, what an entire century of organised effort concluded required a law. Failing at that is not a character defect. It is the predictable result of removing the mechanism and keeping the expectation.
The one move
Give the end of your day back to something that is not your judgement.
Not an app that blocks things. A physical event: the laptop goes in a drawer in another room, the charger stays in the kitchen, the work account signs out on the phone at a fixed time. One thing, mechanical, that does not require you to decide anything at ten past nine, because ten past nine is exactly when your deciding is worst.
That is not self-discipline. It is a whistle. You are allowed to build yourself one.
Questions people ask about this
Who decided to work 40 hours a week?
Congress, in 1938, at the end of a campaign that began more than a century earlier. The Fair Labor Standards Act, signed by Franklin D. Roosevelt, set a maximum working week with overtime required beyond it.¹ ² The idea itself dates to Robert Owen’s slogan of 1817, and the political force behind it came from the labour movement: the 1866 Geneva congress, the ineffective state laws of 1867 and 1868, the general strike of 1 May 1886 and the Haymarket Affair, and the Adamson Act of 1916 for railroad workers.² ³
Did Henry Ford invent the 40-hour work week?
No. PolitiFact rated that claim Mostly False after consulting labour historians at Cornell, the University of Illinois, Sarah Lawrence and Rutgers, along with a curator at the Henry Ford Museum, and concluded that labour unions deserve the primary credit.¹ What Ford did was real and consequential: an eight-hour shift and a five dollar day in January 1914, and a five-day week in 1926.¹ ² He adopted the demand at scale. He did not originate it and he did not make it law.
Why was the 40-hour work week created?
To put a limit on how much of a person’s life an employer could claim. Owen’s 1817 formulation makes the reasoning explicit: eight hours’ labour, eight hours’ recreation, eight hours’ rest.² The 1866 Geneva congress called legal limitation of the working day a preliminary condition for any improvement in workers’ lives.² It was a claim about ownership of time, not a productivity finding, and the productivity argument arrived later as a way of making it palatable to employers.
Why is the 40-hour work week outdated?
Because the enforcement mechanism has disappeared while the workload has not. The statute still exists and, for salaried professional workers, it functions much less as a boundary than it did when a factory whistle marked the end of the shift. Attention research shows what filled the gap: the average time spent on one screen before switching fell from about two and a half minutes in 2004 to 47 seconds, and email is checked an average of 77 times a day.⁸ The argument for a shorter week is also older than it looks. Kellogg ran a six-hour day from 1930 to 1985.⁴
Do we actually work more than our grandparents did?
Probably not, and this is genuinely contested. Juliet Schor calculated 163 additional hours a year compared with the 1960s, using Bureau of Labor Statistics estimates.⁶ John Robinson and Geoffrey Godbey, using time diaries from more than 10,000 people, found the opposite: work hours down and free time up, with women falling from about 37 hours a week in 1965 to 31 in 1985.⁶ Nicholas Crafts found British men’s annual hours fell around a quarter between 1931 and 2011.⁵ The defensible summary is that measured paid hours have fallen, that the fall is much smaller than Keynes predicted, and that neither figure captures the evening you spend not quite working.
The one move
Build yourself a whistle. One physical, mechanical end to the day that does not require you to decide anything at ten past nine, because that is when your deciding is worst.
And if the reason the evenings keep going is not the work itself but everything you are holding underneath it, that is the thing worth ten quiet minutes. No advice, no programme, just the document. Start here.
Who else has measured this
Benjamin Kline Hunnicutt, PhD, Professor at the University of Iowa since 1975, is the historian of shorter hours. Across four books with Temple University Press, including Work Without End in 1987, Kellogg’s Six-Hour Day in 1995 and Free Time: The Forgotten American Dream in 2013, he documents the fifty-five year six-hour experiment at Battle Creek and argues that America abandoned shorter hours as a national goal rather than losing them to necessity.⁴ ⁷
University of Iowa faculty page · biography and bibliography · the book, at Temple University Press
Gloria Mark, PhD, Chancellor’s Professor of Informatics at the University of California, Irvine, has measured attention at work since before the smartphone. Her finding that average time on a single screen has fallen from about two and a half minutes in 2004 to 47 seconds is the clearest available picture of what replaced the boundary.⁸
UC Irvine on her research · American Psychological Association interview
Ileen A. DeVault of Cornell University, Robert Bruno of the University of Illinois School of Labor and Employment Relations, Priscilla Murolo of Sarah Lawrence College and David Bensman of Rutgers are the four labour historians whose assessment underpins the correction at the centre of this article. Their collective verdict was that unions, not Ford, won the modern working week.¹
the fact-check in full
Nicholas Crafts (1949 to 2023), Professor of Economic History at the University of Sussex and previously at Warwick, tested Keynes’s 1930 prediction against eighty years of data and found hours had fallen by about a quarter rather than two-thirds, while lifetime leisure and home production rose 58.4 per cent.⁵
the paper in Economica · free full text · obituary (in memoriam)
John P. Robinson (died 2019) of the University of Maryland and Geoffrey Godbey of Pennsylvania State University produced the time-diary evidence that contradicts Schor’s figures, published as Time for Life: The Surprising Ways Americans Use Their Time.⁶ Printing both sides of that dispute is the only honest way to answer the question.
the book, at Penn State University Press · Robinson obituary (in memoriam)
The laptop on the kitchen table at ten past nine is not a verdict on your willpower. It is what a fence looks like after somebody quietly removed the posts.
Related reading: why you are still solving it at eleven at night, what it looks like when everyone keeps telling you how well you are handling this, and where the famous second-shift figure actually came from.
On the sources. This volume is built on one published fact-check that consulted four named labour historians, two encyclopaedia entries, one reference wiki, two peer-reviewed economics papers, one university press book, one federal history page and one university research programme. It is not based on archival work of our own. Where a fact-check and a reference work disagree, as they do on the Fair Labor Standards Act’s starting number, both figures appear above.
Disclosure
This article is informational and reflects published history and economics. It is not advice of any kind, and nothing in it is medical, legal or employment advice.
We are not historians or economists. We read published research and reference works and translate them into plain English. The findings belong to the researchers and institutions named and linked above. Professor Schor’s doctorate is in economics; she is not a clinician.
Blue Leaf Journal has no affiliation with, and no endorsement from, Professor Juliet Schor, Boston College, the Radcliffe Institute, Professor Benjamin Hunnicutt, the University of Iowa, Temple University Press, Professor Gloria Mark, the University of California, Irvine, Professor Ileen DeVault, Cornell University, Professor Robert Bruno, the University of Illinois, Professor Priscilla Murolo, Sarah Lawrence College, Professor David Bensman, Rutgers University, the estate of Professor Nicholas Crafts, the University of Sussex, the estate of John P. Robinson, Professor Geoffrey Godbey, Pennsylvania State University, PolitiFact, the United States Department of Labor, the Henry Ford Museum or Encyclopaedia Britannica. Naming their work is citation, not partnership.
No commercial relationship. Nobody named above paid for or was paid for this coverage. No book or product is sold or linked for commission here, and there are no affiliate links in this article.
Every figure and quotation was checked against the source listed below on 21 September 2026. If you find an error or a broken link, write to corrections@blueleafjournal.com and we will correct it and date the correction.
References
1. PolitiFact. “Does the 8-hour day and 40-hour week come from Henry Ford, or labor unions?” Rated Mostly False. Source for the verdict, the four named historians and their institutions, the 1866 and 1868 laws, Ford in 1914 and 1926, the 1916 railroad protections, and the Fair Labor Standards Act beginning at 44 hours and phasing to 40 by 1940.
2. “Eight-hour day movement.” Wikipedia. Source for Robert Owen’s 1817 slogan quoted verbatim, the 1866 Geneva congress wording, the Illinois law of 1867, Albert Parsons and the 80,000 marchers of 1 May 1886, the 350,000 strikers at 1,200 factories, the Adamson Act of 1916, the 5 January 1914 Ford announcement, and its summary of the 1938 act.
3. “Haymarket Affair.” Encyclopaedia Britannica. Source for the date of 4 May 1886, the description of the confrontation and the association with May Day from 1889. See also “Fair Labor Standards Act.” Encyclopaedia Britannica.
4. Whaples, R., review of Hunnicutt, B. K., Kellogg’s Six-Hour Day, H-Net Reviews. Source for the 1 December 1930 start, W. K. Kellogg’s stated reasoning, the wartime forty-eight hour week and promise to return, and the last department moving to eight hours in 1985.
5. Crafts, N. “The 15-Hour Week: Keynes’s Prediction Revisited.” Economica. Free full text. Source for Keynes’s 1930 prediction of fifteen hours a week and roughly 780 annual hours, the 1,840 hours figure for 2011, the one-quarter fall against a predicted two-thirds, and the 58.4 and 42.4 per cent lifetime figures.
6. “2 Scholars Find That Americans Have More, Not Less, Free Time.” The Chronicle of Higher Education. Source for Schor’s 163 hours figure, for Robinson and Godbey’s contrary finding and their institutions, for the 1965 to 1985 hours for women and men, and for the methodological dispute between recalled estimates and time diaries. Their book is Time for Life, Penn State University Press.
7. “Benjamin Kline Hunnicutt.” Wikipedia. Source for his post at the University of Iowa since 1975 and his four books with Temple University Press and their years.
8. University of California, Irvine. “Regaining Focus in a World of Digital Distractions.” Source for Gloria Mark’s exact title, the two and a half minutes measured with Victor González in 2004, the 47 second average and 40 second median, and the 77 daily email checks.
If you read one more thing after this, read the volume on what happened to the hours the machines saved, because it is the same mechanism running in the other room.
Written by Nora Whitfield for Blue Leaf Journal. Updated: 21 September 2026.
