# Social jetlag: misalignment of biological and social time

Wittmann M, Dinich J, Merrow M, Roenneberg T · Chronobiology International 23(1–2):497–509 · 2006



## Key finding

Defines social jet lag — the shift in sleep midpoint between work and free days — and links it to evening chronotypes and stimulant use.



[Read the paper](https://pubmed.ncbi.nlm.nih.gov/?term=Social+jetlag:+misalignment+of+biological+and+social+time)

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Educational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.

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