The distinctive point
Egyptian ten-day period: one rung in the Egyptian civil calendar ladder
This unit becomes more informative when read as position 2 of 5 Egyptian civil calendar records by magnitude, with Egyptian civil day below it and Egyptian civil month above it. Its stated basis is ten-days; the system relationship is more revealing than an isolated decimal conversion.
Basis: ten-days. Check the record source.
- smallerEgyptian civil day10 × Egyptian civil day
- largerEgyptian civil month1/3 of Egyptian civil month
What this unit was
Egyptian ten-day period is modelled here as a time standard of the Egyptian civil calendar tradition, associated with Egypt during Pharaonic civil calendar. The converter represents one decan as 864000 s; its basis is ten-days. This is a defined or exact matrix anchor.
Within that setting, the unit belonged to a working system for civil scheduling, ritual or administrative cycles, and astronomical calculation. It should be read with its period, locality, and evidential basis attached, not as a universal value shared by every culture using a similar name.
Evidence of use and sources
The working value is traceable to UCL Digital Egypt, calendar. Its record is classified as high confidence and uses the stated basis rather than an assumed culture-wide constant.
Three directly pertinent excerpts from the supplied library are available.
“Finally the royal cubit of 28 digits”
Flinders Petrie, Ancient Weights and Measures, PDF p. 48. Egyptian linear subdivision
“These various lengths are evidently other standards”
Flinders Petrie, Ancient Weights and Measures, PDF p. 48. coexisting standards
“they us'd two sorts of Cubits”
Tables of antient coins, weights, and measures, PDF p. 95. historical cubit variation
Working definition
Egyptian ten-day period is represented as a Egyptian civil calendar standard associated with Egypt during Pharaonic civil calendar.
The converter uses 864000 s per unit.
How to use it
Basis: ten-days; confidence: high. A shared historical name does not make this value portable to another period or polity.
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