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Greek Astronomical Calendars and their Relation to the Athenian Civil Calendar

Published online by Cambridge University Press:  23 December 2013

B. L. van der Waerden
B. L. van der Waerden
Affiliation:
University of Zürich
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Extract

Several investigations have been devoted to the Athenian calendar and to the cycles of Meton and Kallippos. However, most authors have not clearly distinguished between true and mean lunar months, nor between astronomical calendars and the Athenian calendar. In investigating the Athenian calendar, many authors have made use of the regular successions of full and hollow months described by Geminos in his Isagoge, without first making sure that these months were in actual use at Athens. Discussion as to whether ‘the month’ began with the astronomical New Moon or with the visibility of the crescent might have been avoided if the authors had realised that the word ‘month’ has several meanings and that in every particular case the meaning has to be inferred from the context. Peasants or soldiers, far away from civilisation, would start their month with the visible crescent, astronomers would make it begin at the day of true or mean New Moon, and cities would adapt their festival calendar to the needs of the moment, intercalating or omitting days in such a way that the festivals can be held at the days prescribed by law or tradition. Of course, it may happen any time that a civil month coincides with the astronomical or with the observed lunar month, but in absence of definite evidence we never have the right to identify a civil month with an astronomical month.

Type
Research Article
Information
The Journal of Hellenic Studies , Volume 80 , November 1960 , pp. 168 - 180
Copyright
Copyright © The Society for the Promotion of Hellenic Studies 1960

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References

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