[Bug 237259] cal(1) command outputs wrong data in September 1752

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Sat Apr 13 14:35:22 UTC 2019


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237259

--- Comment #1 from Conrad Meyer <cem at freebsd.org> ---
It is not immediately clear to me if this is actually broken.

Here is the POSIX definition of the behavior around September 1752:

> The cal utility shall write a calendar to standard output using the Julian
> calendar for dates from January 1, 1 through September 2, 1752 and the
> Gregorian calendar for dates from September 14, 1752 through December 31, 9999
> as though the Gregorian calendar had been adopted on September 14, 1752.

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