Ask who benefits from a four-day week and the honest answer is: people with unpaid work waiting at home — which still, in most households, means women benefit differently from men. The fifth day can ease care, expose how care is shared, and do surprisingly little to equalise housework unless couples and employers treat that as a design question too.
The pilots give us a clearer, less sentimental picture than the slogans.
Care gets easier first
In the UK pilot of 2022, 60% of employees said they found it easier to combine work with care responsibilities after moving to a four-day week, in results published in February 2023. That is the most immediate gender-relevant finding: a weekday when schools, clinics, and council offices are open, without using leave, changes the logistics of care more than an extra evening ever can.
Iceland’s public-sector trials, reported by Autonomy and Alda in 2021, described single parents benefiting noticeably and, in heterosexual partnerships, men taking on more housework and childcare when their hours fell from 40 toward 35 or 36. Ireland’s pilot reporting in 2022 highlighted particularly strong gains for women in life satisfaction and sleep — plausible, because women in the sample were more likely to be carrying a second shift at home.
None of this requires the fifth day to be spent on care. Staff in pilots report using it for rest, exercise, study, and life administration as well. But for carers, the option value is the benefit: an appointment that no longer costs annual leave, a parent who can be visited midweek, a child collected without a daily negotiation.
Housework does not equalise by itself
Here is the counter-signal every honest article should carry. Summaries of the US and Ireland pilots in 2022 found little change in the overall balance of household tasks, with some increase in men’s childcare but not in housework more broadly. Time was given; habits, standards, and defaults at home did not automatically move with it.
That gap matters for employers because it limits the benefit. If a woman’s fifth day fills entirely with cleaning, shopping, and caring that previously leaked into evenings, she gains logistics but not recovery. If a man’s fifth day is protected leisure while his partner’s is domestic labour, resentment can grow even as firm-level wellbeing averages improve. Averages hide the fairness story — one reason Day5Group recommends cutting pilot wellbeing data by gender and caring status, where lawfully collected, rather than celebrating a single company mean.
Compressed weeks sharpen the problem. A four-day week of ten-hour days can make daily care impossible on working days: nursery closing times, elder-care visits, and after-school cover do not stretch because a roster did. For parents of young children, a reduced 32-hour week and a compressed 40-hour week are opposite experiences, and the childcare maths should be done before the model is chosen, not after complaints arrive.
What employers can and cannot do
Employers cannot redistribute housework. They can avoid designs that quietly punish carers.
Stagger days off so a midweek day is possible, not only Friday; many carers prefer Wednesday for appointments and a break in the week. Protect the day in workload terms — a “day off” that requires inbox monitoring is not a day off, and carers are often the staff least able to absorb secret working. Watch promotion and rating data during pilots for day-off bias: if people who visibly take the day are marked down on commitment, mothers will notice first, because they have seen that film before.
Part-time staff need explicit treatment. Most four-day models give full-time staff a 20% time cut at full pay; if part-time colleagues, who are disproportionately women, get no hourly uplift, the firm has widened a gender pay-structure gap while congratulating itself on flexibility. Several pilots and non-profit adopters handled this with a pro-rata hourly increase for part-timers; the cost should be in the business case from day one.
Finally, ask, do not assume. A short anonymous pulse — how did you use the day, did it feel like rest, what got harder — broken down carefully, tells you more than any assumption about what “parents” or “women” want. Some staff will trade the day for school holidays differently; some carers of adults need unpredictability cover more than a fixed day.
The fifth day is not a gender policy. It is time, and time lands in households that are not yet equal. Designed well, it makes care visibly easier and gives couples a resource to negotiate over. Designed carelessly — compressed, conditional, or quietly monitored — it can hand the same old work a new weekday to happen on.
Sources
- Autonomy, University of Cambridge and Boston College, UK Four-Day Week Pilot results (February 2023) — care responsibilities and wellbeing findings.
- Autonomy and Alda, Going Public: Iceland’s Journey to a Shorter Working Week (2021) — household and single-parent findings.
- 4 Day Week Global, US and Ireland pilot results (December 2022), including Irish reporting on women’s life satisfaction and sleep and research summaries on household-task balance.
Day5Group is a consultancy that assists in the transition to a 4 day work week. More about Day5Group · All blog articles