On Sun, 28 Dec 2008, Poul-Henning Kamp wrote: > > In addition to the Olsen database, the book "Calendrical Calculations" > is probably required.
"Calendrical Calculations" isn't a reliable source for historians in the way that the Olson database tries to be. CC is a mechanized description of how calendars are supposed to work, not a record of how they are actually used. This is particularly important for observational calendars such as the Islamic calendar where practice can and does differ from theory. The tz database attempts to record what timezones were actually used in different places at different times. Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ SOUTHEAST ICELAND: SOUTH OR SOUTHWEST 5 OR 6, DECREASING 4 AT TIMES. MODERATE OR ROUGH. OCCASIONAL DRIZZLE. MODERATE OR GOOD, OCCASIONALLY POOR. _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com http://six.pairlist.net/mailman/listinfo/leapsecs
