Only three workers out of a potential 200 have taken up tax collection service Urssaf’s offer of a four-day week at its office in Picardie in northern France.
Forty people had expressed interest but most later withdrew.
Reasons given included difficulties reconciling family life, especially childcare, with longer nine-hour days.
Others thought they would be too tired to profit from the extra day off.
Lyon métropole also plans to introduce a four-day week to reduce absenteeism and “make employment more attractive.”
Starting in September, the one-year voluntary trial concerns 5,500 of its 9,600 staff.