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Lengthen the day by twenty-one minutes

Exactly thirty dozen days a year
  (+18, -1)(+18, -1)
(+18, -1)
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The day is currently inconveniently fixed to the concept of Earth's rotation. Whereas this may seem sensible, those of us who live fairly near the poles are used to it being dark during the day and light at night, depending on the time of year. In the meantime, we have to put up with an elegant but rather complex calendar which doesn't divide exactly by twelve. Also, the Martian calendar is based on days of a different length than ours.
Both problems can be addressed by imposing a standard day twenty-one minutes longer than our current solar day and sixteen minutes shorter than the Martian sol. The first day starts on January the zeroth. On approximately the ninth of March, the day has shifted by twenty-four hours. However, consider this. Every sixty-eight days from third of February onwards and for a while either side of those dates, it's daylight at midnight, even in the middle of the winter, and conversely, for several days close to the summer solstice, it's dark at midday and we would actually be able to sleep and in the winter we can avoid getting depressed by the dark evenings.

Throughout the year, there are an extra twenty-one minutes in each day to spend as a lie-in or to get extra stuff done.

The planet moves almost exactly one degree a day in its orbit, which is neat.

There are no more leap years. Months and weeks can divide exactly into a year and the day of the week is always the same. There is only one calendar. The drift would be a few seconds per year.

Meanwhile, Mars and Earth have the same length of day, making it easier to adjust when travelling between them.

nineteenthly, Apr 26 2009

The myth of the 25,26,27 ... hour day http://en.wikipedia..._of_the_25-hour_day
Beware feedback [bigsleep, Apr 27 2009]

[link]






       One of the planks of my presidential campaign platform has always been to slow the earth's rotation such that we get thirty hour days. Two more for work, two more for play, two more for sleep.
normzone, Apr 26 2009
  

       Eppur si muove.
MaxwellBuchanan, Apr 26 2009
  

       I seem to remember that in human circadian rhythm experiments, in the absence of external time cues, subjects tended towards a day longer than 24 hours; so this may work very well. A colleague and I experienced 22 hour days for a couple of months while monitoring each other's mosquito experiments (ironically, I was looking at their circadian rhythms using simulated day/night cycles). That was weird but OK.   

       (Edit) Human circadian period is 24 hours and 11 minutes ± 16 minutes, according to Wikipedia.
spidermother, Apr 26 2009
  

       So, that would work better than the current length in that way too. I thought circadian rhythm was twenty-seven hours.
nineteenthly, Apr 27 2009
  

       YES YES YES [+]
21 Quest, Apr 27 2009
  

       + OK - can I have the contract for making new calendars?
xandram, Apr 27 2009
  

       That would be rather a short-term thing, [xandram]. There'd be a glut of orders shortly before the first year followed by virtually nothing ever again. People would end up only replacing calendars when they wore out. There would have to be new trends and features to keep people interested enough, or calendars would have to be made to fall apart after a year. Some of them are already made that way, of course.
nineteenthly, Apr 27 2009
  

       I applaud the notion but there may be some organizational benefit to working more granular, for example, lengthening the minute by .875 seconds. Or perhaps even lengthening the second itself.
tatterdemalion, Apr 27 2009
  

       //I thought circadian rhythm was twenty-seven hours.//   

       Let me chirp in on that comment. In the absence of daylight maybe, but otherwise daylight is the primary cue. Thus this idea will lead to permanent jetlag. I should know as I work from home quite a lot and the 27 hour day really screws me over. However, when I was a junior programmer on mars 200,000 years ago this wasn't a problem.
bigsleep, Apr 27 2009
  

       Maybe we should habitually throw things (or sneeze) to the east a lot to slow down Earth's rotation then. By the way, interesting number. In the Dan Dare universe, there was a civilisation on Mars at that time.
nineteenthly, Apr 27 2009
  

       How could you possibly get the whole planet sneezing ? ... er I guess that at least answers the question "who bioengineered pig flu?".
bigsleep, Apr 27 2009
  

       I was thinking, in an idea slightly reminiscent of my relative [eleventeenthly], that we should all face the sunrise and get it to trigger off a photic sneeze. Oh, and [tatterdemalion], sorry i missed that and i utterly concur.
nineteenthly, Apr 27 2009
  

       \\Also, the Martian calendar is based on days of a different length than ours.\\ Stupid Martians.
moomintroll, Apr 28 2009
  

       There is a Martian calendar, in fact there are several. All of them assume the real length of the Martian sol. Six hundred and sixty-nine of them to the Martian year. This system would make that six hundred and seventy-seven and a small bit, which is closer to a whole number than the sols are, but further than terrestrial solar days are.
nineteenthly, Apr 28 2009
  

       21 extra minutes in bed. Suits me [+]
up_on_cloud_nine, Apr 28 2009
  

       Greatness. In a world of 1st, 2nd and 3rd shift, daylight does become irrelevant. I would expect an angry outcry from the agriculturalists, but as they would be doing it in the middle of the night (according to the new calender) no one would notice.   

       My only regret: That I have but one bun to give.
MikeD, Apr 29 2009
  

       //All of them assume the real length of the Martian sol. Six hundred and sixty-nine of them to the Martian year.//   

       With the summer holidays that far apart, that might explain why all the Martians emigrated to more convenient planets.
Ling, Apr 30 2009
  
      
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