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Natural time, non-conventional.
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| .1 | Our clocks, by convention, the time is the same all over a single time zone, and every day, every hour, every minute has the same duration (mean time). |
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| .2 | In reality, each location has its own time; each day, each hour, each minute has its natural duration as well. | |
| .3 | The ocean tides and the seeds follow a natural clock, of course with no human convention. |
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| In practice. |
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| .4 | The times of the events concerning the seeds, and the ocean tides, in this site, are formulated as mean universal times. The hours are preceded by the letter u. |
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| .5 | For some data, such as those of the “time windows” [at present, an hypothesis in limbo, insert H], it is necessary to add the equation of time, to have the natural time expressed as mean times, in order to use normal clocks. |
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| Equation of time [eq t]. |
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| .6 | The natural time formulated as mean time is given by the sum (natural time + equation of time specific for the day of the year). |
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