Scandinavian bed and rise times in the Age of Enlightenment and in the 21st century show similarity, helped by Daylight Saving Time

TL;DR

This paper compares Scandinavian sleep and wake times from the Age of Enlightenment to the 21st century, highlighting similarities aided by Daylight Saving Time, based on observations published in a sleep research journal.

Contribution

It provides a comparative analysis of historical and modern sleep patterns in Scandinavia, emphasizing the role of Daylight Saving Time in maintaining similarities.

Findings

Sleep and rise times show notable similarity across centuries.

Daylight Saving Time contributes to aligning sleep patterns.

Historical and modern data reveal consistent circadian behaviors.

Abstract

A Letter to the Editor published in the Journal of Sleep Research