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A deduction of the number of the years from the number of the sidereal days gave, as remainder, the number of civil days in the exeligmos.

The civil day always commences at the midnight preceding this astronomical day.

HOUR, the twenty-fourth part of a civil day, the twelfth part of a natural day or night, a space of time of sixty minutes’ duration.

In England the period of the civil day may also vary under different statutes.

We may remark that the commencement of the astronomical day commences twelve hours after the civil day.