Matthias Drochner <M.Drochner@fz-juelich.de> writes:
> apb@cequrux.com said:
>> encourage people to use the ISO 8601 style
>
> "cal" is in SUSv3, so there is little room for
> improvement if we want to stay compliant.

Well, it is, but there is no prohibition against extensions so long as
the required syntax is supported. It should be okay to allow

cal 2007-12

to be parsed as an extension.

Perry