[PATCH] en_US: define date_fmt (bug 24046)

[Florian Weimer]

* Paul Eggert:

> […] I no longer have access to Solaris 8 (the circa 2000 version), but
> on Solaris 10 in an en_US.ISO8859-1 locale if I run 'TZ=UTC0 date' the
> output is:
>
> Wednesday, January  2, 2019 08:19:11 PM UTC
>
> so it is indeed using 12-hour time with AM/PM, and with a timezone
> indication.

Thanks.  This suggests that changing the locale should not cause too
many problems.

Florian