[TUHS] History of cal(1)?

[Dan Cross via TUHS]

On Thu, Sep 18, 2025 at 1:36 PM Cameron Míċeál Tyre via TUHS
<tuhs at tuhs.org> wrote:
> Hi Dan,
>
> This is not a full answer to your question but cal appeared in Research UNIX 1st Edition, Nov 3, 1971.

Ah, good catch!  It was in /usr/ken and in section 6 of the manual
(games), not section 1.

> I'd be interested to compare the source code, in terms of how it was implemented, between the original and the version I have on this phone which is part of util-linux 2.40.2.

Well, for starters, I'd guess it was in assembly language.

        - Dan C.