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Top message:  What is a metric year? by meeshxsmith   Nov 1, 2009, 5:58 PM

Replying to:  Re: What is a metric year? by meeshxsmith   Nov 5, 2009, 8:30 PM

Re: What is a metric year?

by meeshxsmith    Nov 5, 2009, 8:39 PM

Numerous proposals have been made for alternative base units of metric time. On March 28, 1794, the president of the commission which developed the metric system, Joseph Louis Lagrange, proposed in a report to the commission the names déci-jour and centi-jour (deciday and centiday in English).[1] Base units equivalent to decimal divisions of the day, such as 1/10, 1/100, 1/1000, or 1/100,000 day, or other divisions of the day, such as 1/20 or 1/40 day, have also been proposed, with names such as tick, meck, chi, chron, moment, etc., and multiple and submultiple units formed with metric prefixes. Such alternative units have not gained any notable acceptance, however, mostly from sheer lack of acquaintance and familiarity.

A modified second = 1/100 000 of a day = 0.864 s could be a viable alternative. Any redefinition of the second, however, creates conflicts with anything based on its precise current definition. Another unit for time, more familiar than some other suggestions, could be 14.4 minutes, i.e. a shorter quarter of an hour, or a centiday, as proposed by Lagrange. The centiday was used in China (called ke in Chinese) for thousands of years.

In the 19th century M.J. de Rey-Pailhade proposed using the centiday, abbreviated cé, divided into 10 decicés, 100 centicés and 1000 dimicés.[2]

In 1897, the Commission de décimalisation du temps was created by the French Bureau of Longitude, with the mathematician Henri Poincaré as secretary. The commission proposed making the standard hour the base unit of metric time, but the proposal did not gain acceptance and was eventually abandoned

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