Everyone lives in two time zones
On Friday and Saturday nights the median bedtime moved 1h 12m later. Most people spend Monday recovering from a flight they never took.
Social jet lag
The gap between weekday and weekend sleep is often called social jet lag. Across our sleepers it was 1h 12m at the median, the same as flying from London to Athens every Friday and back every Sunday.
Who shifts most
Students shifted 2h 05m, founders 1h 31m, office workers 1h 09m and retirees just 14 minutes. New parents barely shifted at all, because babies do not keep weekends.
The Sunday night problem
Sunday was the worst night of the week for falling asleep: 23 minutes slower than a Tuesday. The morning diaries blame dread about the week and a late lie-in that morning in equal measure.
Small shifts that worked
Keeping the weekend wake-up within an hour of the weekday one mattered more than the bedtime. Sleepers who did it cut their Sunday delay by half.
The chart
Everyone who took part, grouped. Weekend nights are marked in the downloadable dataset.
Key findings
Three numbers to take away.
The median weekend shift was 1h 12m.
Students shifted most (2h 05m); retirees least (14 min).
Sunday was the slowest night to fall asleep.
Sleeper diaries
