Kuwaiti algorithm: Difference between revisions

Revision as of 19:58, 25 September 2005

Revision as of 05:11, 26 September 2005

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[[Microsoft]] uses the '''Kuwaiti algorithm''' to convert between dates in the Western standard [[Gregorian calendar]] and dates in the Hijri or [[Islamic calendar]]. There is no fixed correspondence defined in advance between the Gregorian [[solar calendar]] and the Islamic [[lunar calendar]], since the latter is defined by the visibility of the new moon by religious authorities and can therefore vary by a day or two, depending on the particular Islamic authority, weather conditions, and other variables. As an attempt to make conversions between the calendars somewhat predictable, Microsoft claims to have created this [[algorithm]] based on statistical analysis of historical data from [[Kuwait]]. However, its results are identical to a variation of the [[tabular Islamic calendar]], which has beenwas introduced by Islamic astronomers around the [[eighth century]].

Inevitably, any predictionarithmetic algorithm is imprecise, and conversions canresults often be in errordiffer by a day or two from observation or complex calculation.

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