Abstract
The dominant part in the mental calculation of the day of the week for any given date is to determine the year share, that is, the contribution of the two-digit year part of the date. This paper describes a number of year share computation methods, some well-known and some new. The “Parity Minus 3” method, in particular, is a new alternative to the popular “Odd+11” method. The paper categorizes the methods of year share computation, and presents simpler proofs of their correctness than usually provided.
DOI: https://doi.org/10.1515/rmm-2016-0008 | Journal eISSN: 2182-1976
Language: English
Page range: 75 - 86
Published on: Dec 8, 2016
Published by: Ludus Association
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year
Keywords:
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© 2016 S. Kamal Abdali, published by Ludus Association
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.