The manpage for "cal" used to have the comment "Try September 1752" (and
yes, I know why); it's no longer there, so when did it disappear? The
SysV fun police?
I remember it in Ed5 and Ed6, but can't remember when I last saw it.
Thanks.
-- Dave
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.
-Henry