www.englandcast.com/2025/03/medieval-two-sleep-cycle/
Did you know that people in the past didn’t sleep in a single eight-hour block? The Medieval Two-Sleep Cycle was a common practice where people slept in two distinct phases—first sleep and second sleep—with a period of wakefulness in between. This nightly pattern, known as biphasic sleep, was a natural and widespread habit across pre-industrial societies, referenced in historical texts, medical writings, and even literature like Chaucer’s Canterbury Tales. Before artificial lighting and industrial work schedules reshaped our sleep habits, medieval people embraced this segmented sleep as part of their daily lives. In this article, we’ll explore how this ancient sleep cycle worked, why it faded, and what it means for modern sleep health.
I heard about the 'Two Sleeps' of medieval times through a friend... interesting read.