On Wed, 10 Jul 2024, Henry Bent wrote:

> Looks like on the BSD side it disappeared between 4.3 Tahoe and Reno.  
> It's in research through v10.  It's in SVR2; SVR4 modifies it to say "An 
> unusual calendar is printed for September 1752."  I don't seem to have 
> manpages with either of the SVR3 source distributions that I have 
> handy.  So to answer your basic question, it stayed around for quite a 
> while.

Just what I wanted; many thanks.  And I couldn't remember what SysV said, 
but I did know that they changed it.

-- Dave