Mind & EverydayFact
You cross time zones every week – without a plane.
Social jet lag, a term coined by chronobiologist Till Roenneberg, is the gap between your mid-sleep on workdays and on free days. Sleep 11 p.m.–6 a.m. on weekdays and 1–10 a.m. at weekends and you shift your body clock by 3 hours – like flying Berlin to Dubai every Friday and back every Sunday.
Useful: Keep your weekend wake-up time within an hour of weekdays to keep your body clock steady.
Source: en.wikipedia.org