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SF 658405: calendar.py to rely on the datetime module instead of the time

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module.

The code is shorter, more readable, faster, and dramatically increases the
range of acceptable dates.

Also, used the floor division operator in leapdays().
This commit is contained in:
Raymond Hettinger 2002-12-25 16:37:19 +00:00
parent 80475bb4d2
commit e11b510a5b
3 changed files with 18 additions and 22 deletions
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10
Doc/lib/libcalendar.tex
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@ -15,10 +15,12 @@ convention). Use \function{setfirstweekday()} to set the first day of the
week to Sunday (6) or to any other weekday. Parameters that specify
dates are given as integers.
Most of these functions rely on the platform provided \function{mktime()}.
Therefore, valid argument values may vary from system to system.
On Unix, valid years are typically between \code{1970} and \code{2037},
but may be work between \code{1902} and \code{2037}.
Most of these functions rely on the \module{datetime} module which
uses an idealized calendar, the current Gregorian calendar indefinitely
extended in both directions. This matches the definition of the
"proleptic Gregorian" calendar in Dershowitz and Reingold's book
"Calendrical Calculations", where it's the base calendar for all
computations.
\begin{funcdesc}{setfirstweekday}{weekday}
Sets the weekday (\code{0} is Monday, \code{6} is Sunday) to start