61 companies in the UK trialed a 4-day work week for the last 8 months. Results:

- 20% reduction in hours worked, no reduction in staff pay
- Significantly decreased rates of stress and illness among the 2,900 participating employees
- Decrease in anxiety, difficulty sleeping, and burnout
- 57% decrease in turnover (staff quitting their jobs)
- Revenue increased 35% vs. prior YoY

Source: https://www.thenationalnews.com/world/uk-news/2023/02/21/worlds-biggest-four-day-working-week-trial-hailed-a-major-breakthrough/