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Posts Tagged ‘Gregorian

“The day after tomorrow is the third day of the rest of your life”*…

 

French Republican Calendar of 1794, Philibert-Louis Debucourt

 

… The Earth’s orbit is almost — but not quite — a round number, and so we continually try to fit the natural world into a mathematical order that makes sense. Even though the Gregorian Calendar solved one major problem (a year now aligned with the time of the Earth’s orbit), in the eyes of many it’s still far from perfect, and two quirks of its construction have continued to nag those inclined towards a more rational calendar. First is the inconsistent number of days in each month, and second, the fact that 365 is not divisible by seven, so that each year calendar dates fall on different days of the week…

Colin Dickey explores some the modern attempts to “correct” these short-comings in “Tempo Shifts.”

… As the Sumerian God Gozer tells Bill Murray and friends at the climax of Ghostbusters, we choose the means of our destruction. The End we imagine, Kermode writes, “will reflect [our] irreducibly intermediary preoccupations,” which is why the Apocalypse is always assumed to be happening within years or decades, rather than centuries or millennia. The plain fact being that no matter how we try to organize and structure the calendar — be we French Revolutionaries, post-Soviet mathematicians, or American evangelicals — we design it so that we are the center of history. Time and tide may wait for no man, but the calendar always revolves around the calendar-makers.

The full– and fascinating– story here.

* George Carlin

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As we count the days, we might spare a thought for Immanuel Kant; he died on this date in 1804.  One of the central figures of modern philosophy, Kant is remembered primarily for his efforts to unite reason with experience (e.g., Critique of Pure Reason [Kritik der reinen Vernunft], 1781), and for his work on ethics (e.g., Metaphysics of Morals [Die Metaphysik der Sitten], 1797) and aesthetics (e.g., Critique of Judgment [Kritik der Urteilskraft], 1790).  But he made important contributions to mathematics as well:  Kant’s argument that mathematical truths are a form of synthetic a priori knowledge was cited by Einstein as an important early influence on his work.

There is … only a single categorical imperative and it is this: Act only on that maxim through which you can at the same time will that it should become a universal law.

– Chapter 11, Metaphysics of Morals

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Written by LW

February 12, 2015 at 1:01 am

“The only reason for time is so that everything doesn’t happen at once”*…

 

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H.G. Well’s The Time Machine is widely credited with having popularized the prospect of time travel (though Edward Page Mitchell”s short story, “The Clock That Ran Backwards” surely deserves a nod).  In fact, the notion of travel into the future dates back to the Mahabharata; and travel into the past, while more modern, to the 18th century (e.g., Samuel Madden’s 1733 novel Memoirs of the Twentieth Century).  The concept flowered in the 19th century– e.g., Twain’s A Connecticut Yankee in King Arthur’s Court, Dickens’ A Christmas Carol, Irving’s “Rip Van Winkle”.  And of course, it has flourished in our time, bot in countless novels and in the newer media of radio, film. and television.

At our post-relativity times, scientists have increasingly taken the concept seriously, looking for theories that might suggest that traversing time might be possible (both backwards and forwards) and investigating claims that time travel has already happened.

So it should come as no surprise that scientists are exploring a new frontier, the internet for evidence, of visitors from another era…

Two researchers from the Department of Physics at Michigan Technological University decided to search the Internet for such evidence and have completed the study, “Searching the Internet for evidence of time travelers,” submitted on December 26 on ArXiv. Authors Robert Nemiroff, professor of physics, and Teresa Wilson, a PhD candidate, said, “The modern ubiquity” of the Internet lends itself to far-reaching methods to search for time travelers. They said a benefit from their effort, given the great reach of the Internet, is that their search is “the most comprehensive to date”…

Read more at PhysOrg’s “Michigan researchers hunt for Internet remnants from time travelers.”  It’s a fascinating read, though– spoiler alert– none were found.

Still, as Randall Monroe reminds us, we’re all time travelers…

 xkcd

Read more at: http://phys.org/news/2014-01-michigan-internet-remnants.html#jCp

* Albert Einstein

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As we check our watches, we might recall that it was on this date in 1582 that Italy, Spain, Portugal and Poland introduced the Gregorian calendar.  While this was “October 5” in the rest of the world, those four countries, adopting Pope Gregory XIII’s innovation, skipped ten days– so that there, the date shifted from October 4 the day before to October 15.  With the shift, the calendar was aligned with the equinoxes, and the lunar cycles used to establish the celebration of Easter.  Britain and its colonies resisted this Popish change, and used the Julian calendar for another century and a half, until September 2, 1752.

From a work published in 1582, the year of the calendar reform; days 5 to 14 October are omitted.

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Written by LW

October 5, 2014 at 1:01 am

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