I am an American, so I am allowed to complain every year about the aberration of Daylight Savings Time, also known as Disrupted Sleep Time. Now that America is not a farm-centric nation, why do we torture our bodies every six months and change the clocks? Pick a time and keep it!
I like seeing sun later in the day instead of worrying about when it gets light in the morning – for me, I’m bleary eyed and in search of coffee no matter when I wake up. Having light outside makes no difference to me in the morning, I’d rather have daylight at 7 PM than be able to see my cows as I milk them.
In other words, keep the clocks set in the “spring forward” position, but don’t change them back!
Interesting bit of historical research about human sleep rhythms.
In 2001, historian Roger Ekirch of Virginia Tech published a seminal paper, drawn from 16 years of research, revealing a wealth of historical evidence that humans used to sleep in two distinct chunks.
His book At Day’s Close: Night in Times Past, published four years later, unearths more than 500 references to a segmented sleeping pattern – in diaries, court records, medical books and literature, from Homer’s Odyssey to an anthropological account of modern tribes in Nigeria.
Roger Ekirch says this 1595 engraving by Jan Saenredam is evidence of activity at night Much like the experience of Wehr’s subjects, these references describe a first sleep which began about two hours after dusk, followed by waking period of one or two hours and then a second sleep.
“It’s not just the number of references – it is the way they refer to it, as if it was common knowledge,” Ekirch says.
During this waking period people were quite active. They often got up, went to the toilet or smoked tobacco and some even visited neighbours. Most people stayed in bed, read, wrote and often prayed. Countless prayer manuals from the late 15th Century offered special prayers for the hours in between sleeps.
And these hours weren’t entirely solitary – people often chatted to bed-fellows or had sex.
A doctor’s manual from 16th Century France even advised couples that the best time to conceive was not at the end of a long day’s labour but “after the first sleep”, when “they have more enjoyment” and “do it better”.
Ekirch found that references to the first and second sleep started to disappear during the late 17th Century. This started among the urban upper classes in northern Europe and over the course of the next 200 years filtered down to the rest of Western society.
By the 1920s the idea of a first and second sleep had receded entirely from our social consciousness.
He attributes the initial shift to improvements in street lighting, domestic lighting and a surge in coffee houses – which were sometimes open all night. As the night became a place for legitimate activity and as that activity increased, the length of time people could dedicate to rest dwindled.
In his new book, Evening’s Empire, historian Craig Koslofsky puts forward an account of how this happened.
“Associations with night before the 17th Century were not good,” he says. The night was a place populated by people of disrepute – criminals, prostitutes and drunks.
“Even the wealthy, who could afford candlelight, had better things to spend their money on. There was no prestige or social value associated with staying up all night.” That changed in the wake of the Reformation and the counter-Reformation. Protestants and Catholics became accustomed to holding secret services at night, during periods of persecution. If earlier the night had belonged to reprobates, now respectable people became accustomed to exploiting the hours of darkness. This trend migrated to the social sphere too, but only for those who could afford to live by candlelight. With the advent of street lighting, however, socialising at night began to filter down through the classes.
Personally, if my natural sleep pattern is followed (that is, if I don’t have other pressing reasons to change my patterns, like work related issues, or illness, or whatever), I take an hour nap in the late afternoon/early evening, stay up for a while, then sleep about 6-7 hours.