Bruce Momjian <bruce(at)momjian(dot)us> writes:
> As far as how to even document this, I have no idea.
It already is documented. See
http://developer.postgresql.org/pgdocs/postgres/datatype-datetime.html#DATATYPE-TIMEZONES
specifically the point that POSIX zone names have the opposite sign
convention from ISO-8601.
The great thing about standards is there are so many to choose from ;-)
regards, tom lane