Sleep, Alarms, and Social Jet-Lag

13 May 2012

how the clock can lead to obesity.

A new study has introduced yet another term and reason for alarm, and dare I say, panic. Panic now! The term is “social jetlag” and terms like these are enough to make the inner logophile take to the streets and riot.


Is Your Alarm Clock Making You Fat?

As if you needed another reason to despise your alarm clock. A new study suggests that, by disrupting your body’s normal rhythms, your buzzing, blaring friend could be making you overweight.

The study concerns a phenomenon called “social jetlag.” That’s the extent to which our natural sleep patterns are out of synch with our school or work schedules. Take the weekends: many of us wake up hours later than we do during the week, only to resume our early schedules come Monday morning. It’s enough to make your body feel like it’s spending the weekend in one time zone and the week in another.

But is social jetlag actually bad for your health? To investigate, chronobiologist Till Roenneberg at the University of Munich in Germany and colleagues compiled data from tens of thousands of responses to an internet survey on sleep patterns and other behaviors. Previous work with such data has already yielded some clues. “We have shown that if you live against your body clock, you’re more likely to smoke, to drink alcohol, and drink far more coffee,” says Roenneberg.

In the new study, the team measured the social jetlag of people ages 16 to 65 by calculating how offset sleep times were on workdays and non-workdays. They then constructed a mathematical model that gauged how well biological factors, such as age, gender, sleep duration, and social jet lag could predict body weight. They found that the first three factors were important predictors of body weight for all people. In addition, for people who are already on the heavy side, greater social jet lag corresponded to greater body weight. However, social jet lag was not a good predictor for people with normal body weights, the team reports online today in Current Biology.

(rest of the article via the link)

I know I’ve been struggling with this since my new contract has me up at 5 AM every Tuesday and Thursday, but not other days when my schedule is more flexible. My sleep has been badly disrupted, and I often find myself passing out in the middle of the afternoon for a couple of hours (and I’m typically not one to nap). The biggest disadvantage of social jetlag over regular jetlag is that it doesn’t reduce the rate at which you age. It’s lose-lose (except weight…)

Here’s are some typical examples of the time of day when good, bad, and ugly things typically occur:

222 Days to Dec 21st 2012

the Body Clock Guide to Better Health

24 February 2012

Listening to the pulse of your own rhythms.

The Body Clock Guide to Better Health – How to use your body’s natural clock to fight illness and achieve maximum health (2000) by Michale Smolensky and Lynn Lamberg

1. It’s about TIME

p5-6 “We report evidence from studies at leading medical centers worldwide showing that:

  • Many illnesses disrupt body rhythms.
  • The signs and symptoms of many illnesses vary across the twenty-four-hour day over the month, and around the year.
  • Time of day patterns help identify causes of many illnesses.
  • Chronotherapy, or timed treatment, aims to correct these underlying causes or reduce their adverse impact.
  • Glitches in the body clock itself may undermine health.
  • The time of day you take diagnostic tests or undergo medical procedures alters the results.
  • Time-of-day norms are known for many rhythms.
  • The time you take medicine matters.
  • Nondrug treatments may help correct underlying disturbances in the body clock.
  • How you organize your daily life, with respect to sleep, meals, exercise, and other factors may make  symptoms better or worse, and hasten or slow your recovery.

p9 “…the way your body absorbs, uses, and excretes drugs varies over the day. The same dose of medicine may be too much at one time, and too little at another. It may not even work at all.”

2. Your body is a Time Machine

p13 “In any one person, in all of us, body temperature, blood pressure, pulse and breathing rates, concentrations of hormones in the blood, hand dexterity, sensitivity to pain, and all other bodily functions differ markedly over the twenty-four-hour day. These variations are not random. They occur in synchrony with our habitual daily pattern of activity and rest.”

The Best of Times

p19 “Drug studies typically are conducted in the daytime for the convenience of both scientists nd subjects. Tests often begin early in the morning so they can be completed by the end of the normal workday. Ludicrous as it may seem, even some sleeping pills undergo testing this way.”

4. How Your Body Clock Works

p33 “The time at which the body is most sensitive to light comes when body temperature is lowest, around 4 AM to 5 AM.”

p35 “Signals from the eyes travel on two pathways to the brain in humans and other animals. Conscious vision travels by one route, and circadian vision, the other… Some blind people also function well on a twenty-four-hour day. They may not consciously recognize light, but still may receive circadian clock-setting light information…”

p36 “Light tells us it is daytime. The hormone melatonin tells us it is night. both day- and night-active species secrete melatonin mainly in the dark.”

“Melatonin is produced by the pea-sized pineal gland just behind the hypothalamus. Dusk tells the SCN to tell the pineal to turn melatonin secretion on, and at dawn to turn it off. We secrete melatonin longer in the long nights of winter, and for a shorter time in the short nights of summer. Changes from day to day alert animals that days are growing shorter or longer and, if they breed only in certain seasons, that it is the right or wrong time to breed. Melatonin may play a role in human reproduction, too.”

5. Are You a Lark, an Owl, or a Hummingbird?

[note: Lark = early bird, owl = night owl, hummingbird = in between, in a ratio of 1:2:7]

p41 “Some of us think of ourselves as night people, but humans can’t truly claim the night as home territory. We are programmed to function best in the daytime. We can’t see in the dark.”

“Lark and owl traits influence many aspects of daily life, including when we feel most alert, or when we sleep best. These traits determine when we most enjoy meals, exercise, sex, and other activities.”

p48-9 How Larks and Owls Differ




Most alert (self-report) Around noon Around 6 PM
Most productive (self-report) Late morning Late morning and late evening
Most active Around 2:30 PM Around 5:30 PM
Best mood Between 9 AM and 4 PM Steady rise from about 8 AM to 10 PM
Temperature highest Around 3:30 PM Around 8 PM
Age Most persons over age 60 Most college students and twentysomethings
Bedtime Go to bed two hours earlier than owls; fall asleep faster More variable bedtimes, stay up later on weekends and holidays
Waketime Awaken at desired time Awaken about same time as larks on workdays, 1-2 hours later on days off
Use of alarm clock Don’t need it Need multiple alarms
Temperature lowest Around 3:30 AM Around 6 AM
Quality of sleep Lifelong: sleep more soundly; wake up more refreshed, usually 3.4 hours after temperature minimum, daily low point on body clock Lifelong: get less sleep wake up sleepier, usually 2.5 hours after temperature minimum
Nap Rarely Take more and longer naps; fall asleep more easily in daytime
Mid-sleep time Around 3:30 AM Around 6 AM
Favorite exercise time Morning Evening
Peak heart rate Around 11 AM Around 6 PM
Lowest heart rate Around 3 AM Around 7 AM
Mood  Mood declines slightly over day Mood rises substantially over day
Morning behavior Chatty Bearish
Evening behavior Out of steam Full of energy
Mealtimes Eat breakfast 1-2 hours earlier than owls Often skip breakfast; eat other meals at same times as larks on workdays, 90 minutes later on days off
Favorite meal Breakfast Dinner
Daily caffeine use Cups Pots
Personality More introverted?(still debated) More extroverted?(still debated)
Shift-work adaptability Work best on day shifts Work best on evening shifts; tolerate night and rotating work better
Travel More jet lag Adapt faster to time-zone changes, particularly going west
Peak melatonin secretion About 3:30 AM About 5:30 AM

7. A Good Night’s Sleep

p66 “It is increasingly clear that good sleep, and enough of it, is critical for both mental and physical health.. Too little sleep has wide-ranging ill effects.”

p67 “Missing sleep lowers the body’s production of natural killer cells, an important part of our self-defense system. … To fight infections, we produce chemicals called cytokines that make us feel sleepy.”

p70 “Sleep gates open and shut roughly every 90 to 120 minutes… Sleep gates explain why you may find it hard to fall asleep if you go to bed early.”

p77 “When people are tired, Donald Blimise notes, they eat more, and they eat more often.”

p77-9 Timewise Tips for Good Sleep

  • regularize your schedule
  • Program yourself to sleep with daily rituals
  • Keep your bedroom dark, or wear eyeshades
  • Keep your bedroom quiet
  • Keep your bedroom cool
  • go to bed only when sleepy
  • Reserve bed and bedroom for sleep and sex
  • If you can’t fall asleep within thirty minutes, get out of bed
  • If you nap, limit time lying down to thirty minutes in midafternoon
  • Take a hot bath ninety minutes before bedtime
  • Exercise regularly
  • Avoid caffeine within five hours of bedtime
  • Don’t drink alcohol or smoke near bedtime
  • Learn relaxation techniques

9. Fitness by the Clock

p92 ” How strong you are, how fast, how accurate, how flexible, how quick-witted, how focused, and how able you are to keep going are among the numerous factors that vary over the day, some modestly and others markedly.”

“Exercising at the times your body is most suited for it has many pluses: you’ll perform better, be less likely to get hurt, and probably enjoy it more.”

“As a general rule, physical performance is best, and the risk of injuries least, in late afternoon and early evening.”

10. Time to Eat

p110 “Body rhythms call for different mixes across the day of the three essential macronutrients: carbohydrates, proteins and fats.”

11. Time for Sex

p122 “Among both married and single heterosexual couples, sex is most frequent on the eighth day of the woman’s menstrual cycle, counting from the first day of menstruation.”

“Sexual desire and fantasies in women peak about a week later, at mid-cycle, when they ovulate.”

p123 “Although popular culture links spring with romance, people have sex most often in the fall. This is true for the population as a whole, despite vacations, religious practices that either encourage or discourage sex, and similar events that may alter the frequency of sex for some individuals and groups.”

Menstrual Cycle Clock

p128 “Light exposure, crucial for strong daily rhythms, also may ensure menstrual regularity.”

“Evidence that fertility rates are lower in areas where people spend most of their time indoors suggest light’s importance. … Fertility rates are higher closer to the equator, where daylight hours are longer, than in far northern latitudes.”

“[Menstruation] starts sooner in girls who live at sea level than in those who live at higher altitudes, with higher light intensity. First menstruation also shows an annual pattern. It begins most often in the late fall and early winter, particularly in girls who live in rural settings, suggesting a tie to changing day length.”

13. Clockwatching at Work

p166-8 “…research suggests how sleep loss may have contributed to some of the twentieth century’s most grievous industrial catastrophes.”

  • the crisis at Three Mile Island nuclear power plant
  • the Exxon Valdez spill
  • the space shuttle Challenger explosion
  • the meltdown and explosion of a reactor at the Chernobyl nuclear plant
  • the chemical disaster in Bhopal, India

14. A Time to Heal

p193-4 “Charting your own body rhythms is a good first step in health maintenance and disease prevention. You need only a few simple tools.”

With a pencil and paper you can chart

  • your mood across the day
  • your alertness across the day
  • your wake/sleep cycle, and the time and type of disturbances of sleep
  • what you eat and when you eat it
  • symptoms of pain, fatigue, urinary frequency, etc…

With a wristwatch you can chart

  • your heart rate
  • your breathing rate

With a thermometer you can chart

  • body temperature over the day
  • body temperature across your menstrual cycle

With a blood pressure cuff

  • blood pressure over the day”

the Worst of Times

Health Around the Year

301 Days to Dec 21st 2012

Rhythms of Life

22 February 2012

Book Notes on Chronobiology and Photoperiodism.

Rhythms of Life – the Biological Clocks that Control the Daily Lives of Every Living Thing (2004) by Russell G. Foster & Leon Kreitzman

p2 “The big difference between us and other living things is that to some extent we can cognitavely override these ancient hard-wired rhythms. Instead of sleeping as our bodies dictate, we drink another cup of coffee, turn up the radio, roll down the car window and kid ourselves that we can beat a few billion years of evolution.”

“When [daily circadian rhythm] is disrupted we suffer from the relatively mild symptoms of jet-lag through to serious and poetntially life threatening conditions such as depression and sleep disorders.”

p3 “[Biological clocks]… are reset at sunrise and sunset each day to link astronomical time with an organism’s internal time.”

p5 “All of us in the developed world now live in a ’24/7′ society. This imposed structure is in conflict with our basic biology. The impct can be seen in our struggle to balance our daily lives with the stresses this places on our physical health and mental well-being. We are now aware of this fundamental tension between the way we want to live and the way we are built to live.”

[see Colin Pittendrigh]

p38 “Every atom in our bodies is oscillating at around 1016 Hz.”

“The rods and cones in the retina respond to light oscillating at between 1015 – 1014 Hz. The brain’s electrical activity…has a frequency of 101 Hz… The heart beats at approimately 100 Hz…and respiration occurs at about one breath every six seconds.”

p97 “Although at some level everything about a simple living organism is implied in its genes, on the other hand, you really have to understand the products of the genes and how they interact, which is more complex than just knowing the sequence of the genes.” –Clyde Hutchenson (1999)

p102 “Anticipation is the key to…biological survival and hence success… The anticipation we are talking about is deeper and more profound because it tunes in an organism to its broader environment. Francois Jacob, one of the great pioneers of molecular biology, said, “one of the deepest, one of the most general functions of living organisms is to look ahead, to produce a future.”


  • the VLPO (ventrolateral preoptic nucleus) of the anterior hypothalamus promotes sleep. Neurones from this nucleus release GABA (gamma-amino butyric acid), an inhibitory neurotransmitter of the nervous system. The neurones project to and inhibit the activity of the nuclei of the ascending arousal system, and the lateral hypothalamus (LH).
  • The ascending arousal system (AAS) of the brainstem and hypothalamus promotes wakefulness in the forebrain. Neurones from five regions in this complex (LDT, PPT, DR, LC, TMN) release several excitatory neurotransmiters. In the brainstem, neurones from teh LDT (laterodorsal tegmental nuclei) and PPT (pedunculopontine tegmental nuclei) project to the thalamus, and from there to the forebrain. These two nuclei are responsible for the release of acetylhoine. The LC (Locus coeruleus), also in the brainstem, has neurones that project the forebrain and release noradrenaline. the DR (dorsal raphe nucleus) of the brainstem has neurones that project to the forebrain and release serotonin In the hypothalamus, neurones from the TMN (tuberomammillary nucleus) project to the forebrain and release histamine.
  • The lateral hypothalamus also promotes wakefulness. Neurones from this nucleus release orexin (also called hypocretin), a very recently discovered neuropeptide. Neurones project to the nuclei of the ascending arousal system, the forebrain, as well as the VLPO.
  • The NREM/REM oscillator is a cluster of five separate nuclei in the brainstem that provides the switch between NREM and ReM sleep. Three of these nuclei, the LDT, PPT and BRF (brainstem reticular formation), are interconnected and excite the activity of both themselves and the two other nuclei involved in the NREM/REM oscillator. the LC and DR form a second functional unit. .The LC and DR are interconnected and inhibit the activity of both themselves and the LDT, PPT and BRF functional unit. This reciprocal set of interactions generatess a flip-flop switch that produces a roughly 90-minute oscillation in NREM and REM sleep.
  • The suprachiasmatic nuclei (SCN) regulate the various sleep structures of the brain either directly by neural or chemical outputs, or indirectly by teh release of the pineal hormone melatonin. Melatonin is high throughout the night, and when administered has been shown to increase the propensity for sleep in humans.

Rhythms in Humans





00:00-02:00 ↑sleep initiation

↓gastric motility


↑cerebral infarction

↑growth hormone

↑uric acid concentration

02:00-04:00 ↑gastric ulcer crises

↑gall bladder symptoms↑asthma



↑triacyl glycerol



04:00-06:00 ↓body temperature


↓deepest sleep

↓urine production


↑gastric ulcer crises









06:00-08:00 ↑sleepiness/tiredness ↑rheumatoid arthritis

↑allergic rhinitis







↑plasma catecholamines

↑fight or flight system

↑platelet viscosity

↑blood viscosity

↓fibrinolytic activity

↑NK-Cell activity

08:00-10:00 ↑bowel movement

↑blood pressure

↑heart rate

↑myocardial infarction


10:00-12:00 ↑concentration

↑Short-term memory

↑logical reasoning

↑blood pressure

↑myocardial infarction



12:00-14:00 ↑concentration

↑short-term memory

↑logical reasoning

↑urine production

↑airway patency

14:00-16:00 ↑insulin
16:00-18:00 ↑osteoarthritis


18:00-20:00 ↑body temperature


↑cardiovascular efficiency

↑muscle strength


↑grip strength

↓sleep propensity

20:00-22:00 ↑gastric acidity ↑skin sensitivity

↑menopausal flushes

303 Days to Dec 21st 2012

Light, Health, Rhythm

17 January 2012

How reforming the calendar can improve your health. Seriously.

Previous post on Human Gestation, Time and Becoming

In the course of researching calendars, time, and culture, I’ve come across a number of resources that describe our bodies’ and brains’ relationship to the seasons. The bias tends towards those of us in the northern temperate zone, where the majority of the world’s population lives. It helps that the bulk of the earth’s landmass is there. The torrid zone between the tropics of cancer & capricorn are directly under the path of the sun through our skies twice a year, and see very little variance in daylight throughout the year, whereas at the poles there are long periods where the sun doesn’t rise, those when the sun doesn’t set. The rising in the east and setting in the west makes little sense there.

However, for the majority of us, in looking at what most of us share, have a responsibility to keep in mind the living circumstances of the various minorities, as they still make up a large number of people, cultures and customs.

from The Light Book (TLB) by Jane Wegscheider Hyman, Introducing Biological Rhythms (IBR) by Willard L Koukkari & Robert B Sothern, Space, Time and Medicine by Larry Dossey, M.D. (STM)

“Our bodies may begin measuring time before birth. In animals, and perhaps in humans, the fetus is first cued to the 24-hour cycle in the womb. Nutrients and hormones regularly cross the placenta and enter the bloodstream of the fetus. This flow from the mother, as well as her body temperature and activities, reflect her circadian rhythms, and the fetus cues its internal day according to hers.” – TLB

“Many illnesses, perhaps most, may be caused either wholly or in part by our misperception of time.” – STM

Regular Rhythms

“Researchers think that circadian rhythms are as old as life itself, enabling selected organisms to function in time to astronomical rhythms.”- TLB

“The normal development, reproduction, and activities of organisms are often dependent upon the duration and timing of light and dark spans, which in nature are associated with the seasons. This process is called photoperiodism, a complex and diverse process that is a basic principle of biology and is intrinsic in the temporal organization of life.” -IBR

Daily Rhythms (YMMV)

00h00 prolactin (growth hormone) increases
02h00 body temperature at its lowest, melatonin at its highest, cortisol increases
05h00 adrenaline, heart rate and blood pressure increase
04h00 – 12h00 inflow of blood
06h00 prolactin decreases, cortisol peaks, heart rate increases
09h00 melatonin decreases, noradrenaline increases
11h00 – 12h00 sympathetic nervous system activity, and body temp. increase
15h00 blood pressure peaks
16h00 body temp. decreases, melatonin increases
22h00 blood pressure and heart rate decrease

06h00 – 11h00 greatest use of carbohydrates
12h00 – maximal use of carbohydrates
13h00 – peak in food metabolism
08h00 – peak in male alcohol metabolism
15h00 – peak in female alcohol metabolism

Peak times for various functions:

10h00 – 12h00 concentration & short-term memory
13h00 – 18h00 sports, physical activity
17h00 – 21h00 practice, musical instrument
19h00 – 00h00 study & long-term memory

the eyes are most sensitive at twilight – dawn & dusk – at this time, the eyes calibrate the time of day with the season

Lunar Rhythms

“Overall, the quality of full moonlight appears to be quite close to that experienced just after sunset, a significant feature since photoreceptors of oscillators, such as the phytochromes, cryptochromes, and other pigments, depend not only upon the total energy of the visible spectrum, but rather upon the energy of specific wavelengths. Furthermore, it is the light present at dawn and dusk, not the changes in irradiance during day and night that organisms utilize for circadian photoentrainment.” – IBR

the following indicate increases of biological functions and activity near the moon phases.

skin cells rise to the surface of the skin over a 29-day cycle.

New Moon

  • births (starting at last quarter)
  • menstruation
  • increased urine retention
  • myocardial infarction (heart attack)

Full Moon

  • meal intake increases, alcohol intake decreases
  • ovulation
  • psychopathology in schizophrenics
  • aggressive behaviour

Seasonal Rhythms

Seasonal changes in cortisol, testosterone, thyroxine and serotonin affects health, mood, sleep and sexuality.


  • metabolic rhythm, glucose and glycogen levels peak
  • menarche (first menstruation)
  • depression,  chronic fatigue, eating disorders, seasonal affective disorder, sleep problems


  • sexual activity (also in autumn)
  • conception
  • estrogen target cells
  • heart responds better to exercise (also in summer)
  • alcoholism
  • mania & suicide


  • heart responds better to exercise (also in spring)
  • lungs take in more oxygen
  • mania


  • sexual activity (also in Spring)
  • testosterone peaks

Biological – Neurological

“The SCN [superchiasmatic neuclei] is called an oscillator or pacemaker because it sets the pace of the body’s various rhythms, keeping them coordinated with one another and with the Earth’s rotation.”- TLB

“The retino-hypothalamic tract through which light transmits its time signals to the brain is separate from the visual pathway.”- TLB

“The pineal gland secretes melatonin circadianly, which in turn regulates the body’s circadian rhythm.”- TLB

Temporal Ailments

“Light thus has the ability to ‘act like a drug’ and, as such, has become a public health issue. Areas possibly affected by changes in melatonin production include endocrine functions associated with puberty, psychiatric illness, stress-related disorders, immune responses and carcinogenesis.”- IBR

“While prior human exposure to artificial light at night came from sources such as flames of an orange red fire or the yellow light of candles, gas lamps or incandescent bulbs, today’s lights emit more blue light…”- IBR

Better lighting practices

  • full-spectrum lighting during the daytime indoors
  • non-blue lighting at night, indoor & outdoor
  • night workers should wear orange lens glasses when outside in the AM (called Blue Blockers, they prevent MLT suppression)

“…our lives are so chronometrically dominated that we not only have become unconscious of the cycles in nature, we have become inured to the cycles within ourselves.”  – STM

“We no longer eat when hungry or sleep when sleep, but follow the dictates of the clock.” – STM

“Through a distorted view of time we have patched together a mangled view of the universe.” – STM

Calendar Reform – a Solution

“Social Synchronization refers to a behavioral rhythm being regulated by an external source generated by another individual or some other social condition. It occurs not only in humans, but many other species, as well…” – IBR

Social synchronization is as varied as are our cultures. For example, in Taiwan, people are scheduled different weekends, for if the majority of people had the same two days off work, it would overwhelm the infrastructure. In a system such as this, people are in no small way synchronized according to which days serve as their workdays and weekdays. A more fundamental tool of synchronization is the 24-hour clock. It is far more universal than the calendar, despite the 24 time zones (there are more than that. Newfoundland is 1/2 hour aread of Atlantic time).

The various calendars do more to synchronize our activies, both with the local calendars in all their varieties as well as the globally used Gregorian. There are purely lunar calendars, the Islamic Hijra being the most widespread, that synchronize the populations according to the lunar cycle. Ramadan, for example, is an entire lunar month of fasting, and a fundamentally important observation in Islam. There are solilunar calendars, the Hebrew, Chinese, Hindu and Buddhist calendars for example, which tie lunar cycles to the year. Considering the populations that observe these, they are probably the most observed calendar systems outside of the Gregorian. These synchronize their users to the moon and the moon to the seasons. There are solar calendars, the Gregorian, Julian, Persian, Baha’i and others, that link their users to the annual cycle of the seasons. And finally, there are calendars that synchronize their users to man-made rhyths, such as the Pawukon used in Bali, Indonesia.

“…the flow of time is seen as a psychological event not representing a true feature of the physical world…” – STM

The Gregorian is the calendar to single out, as it is not tied to the day, and the year, but not to the lunar cycles, or the cardinal points (equinoxes & solstices), to any astronomical phenomena (perihelion & aphelion, planetary transits or other events). It is quite decidedly un-natural in its design. The 7-day market week may have originated with observation of the quarters of the lunar cycle, but now the months are no longer lunar, and the weeks do not synchronize with months or lunations in any meaningful way.

The Gregorian can be looked at as a misrepresentation of the natural cycles that we have used in measuring time since we’ve begun observing the skies, creating an irregular, distorted paradigm of time, unrelated to moon, season or even any cohesive idea of temporal cycles. theAbysmal Calendar has been designed to account for these distortions, to provide a paradigm of time that is regular, perpetual, progressive, elegant, and more globally representative.

Solutions offered by theAbysmal Calendar

  • Follows the lunar month, called lunations
  • The year begins at the Winter Solstice
  • Days begin at midnight
  • Lunations begin at the New Moon
  • Quarters begin on or near the Solstices and Equinoxes
  • Years begin at the Winter Solstice

Following a solilunar calendar will realign our social activity with the natural rhythms to which we are tied through our psyches and reproductive cycles. If the calendar is a representation of our understanding of time, why would we adhere to one that is removed from nature, irregular, distorted, and anachronistic?

What say you? Does such a shift hold some key to better health?

339 Days to Dec 21st 2012

Quarters begin on or near the Solstices and Equinoxes