Talk:Holidays related to Easter: Difference between revisions
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:Good idea, especially if you specify the Gregorian Calendar and Catholic rules (i.e., no ambiguity from calendars or religious denominations). –[[User:Dkf|Donal Fellows]] 22:30, 8 July 2010 (UTC)
::All of the easter holiday rules are catholic rules. But some of the dates required by the current task are dates when older versions of the rules were the "officially accepted versions". I would recommend, in addition to specifying the current catholic rules and the gregorian calendar, that we also change the task's example to use years from 1990 through 2020. --[[User:Rdm|Rdm]] 17:00, 9 July 2010 (UTC)
You can't take away the uncertainty; different churches use different rules (Gregorian, Julian, and Revised Julian), so you have to specify at least which of those you want. But having specified Gregorian, there's no need to limit it to such a narrow range of years; the Gregorian rules are valid in the Western Church as far back as the Gregorian calendar has been in use, which is of course locale-dependent, but goes back at least as far as 1929 everywhere (see [[wp:Gregorian Calendar#Adoption]]), and those rules are valid for the foreseeable future as well (though there have been proposals to abandon them in favor of a wholly astronomical calculation.) --[[User:Markjreed|Markjreed]] 03:58, 4 June 2011 (UTC)
Easter is defined relatively simply, albeit with an odd combination of factors: it's the first Sunday ''after'' the first full moon that occurs ''on or after'' the day of the Northern Hemisphere's vernal equinox. The devil is in the details. The traditional rules make use of approximations rather than accurate astronomical calculations; the details of the approximations changed between the Julian and Gregorian calendars; and the Eastern Orthodox Churches never adopted the Gregorian rules. In 2012, Western churches will observe Easter Sunday on April 8th, but the Julian calculation places it on April 2nd, and because of the 13-day difference between the calendars, the actual date of Orthodox Easter is April 15th. -[[User:Markjreed|Markjreed]] 03:58, 4 June 2011 (UTC)
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