How far back in time does iCal go (accurately)?
Silly question, I know, but is there a built in limit or a point at which iCal becomes inaccurate?
MacBook, Mac OS X (10.7.5)
Calculators with a calendar facility normally go back as far as 1904, or sometimes 1901, because of the leap year odditiy (2000 was a leap year but 1900 wasn't) so for two centuries the every four years rules works, but not before 1901.
iCal however correctly shows 1900 as not a leap year, and you can enter any earlier date you like. I haven't checked that the days of the week are correct, but I would image that it works back to September 1752, when 11 days were dropped as a result of the change from the Julian to the Gregorian calendar (which caused disturbances because people thought 11 days had been taken off their life span). Dates prior to that in iCal would not match contemporary usage.