Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. multidisciplinary concepts
5. [dates and dating systems]
6. dating systems
7. [dating systems by specific type]

Anotations

Scope note:

Ancient Egyptian calendar having a year of 365 days and 12 months of 30 days each, plus five extra days at the end of the year. The months were divided into three decans of ten days each. The Egyptians may have used an earlier luni-solar calendar.