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Subject: Re: [boost] gregorian::date limited to years 1400 - 9999
From: alanbirtles2 (alan.birtles_at_[hidden])
Date: 2016-12-23 04:29:13

The lower limit is more or less explained in the documentation

> The implemented calendar is a "proleptic Gregorian calendar" which extends
> dates back prior to the Gregorian Calendar's first adoption in 1582. The
> current implementation supports dates in the range 1400-Jan-01 to
> 9999-Dec-31. Many references will represent dates prior to 1582 using the
> Julian Calendar, so caution is in order if accurate calculations are
> required on historic dates. See Calendrical Calculations by Reingold &
> Dershowitz for more details. Date information from Calendrical
> Calculations has been used to cross-test the correctness of the Gregorian
> calendar implementation.

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