Bruce Momjian <bruce(at)momjian(dot)us> writes:
> The problem is that the 2-digit year check is for <=2 digits, not
> exactly two digits:
> ...
> This leads to some unexpected outputs:
> test=> select '1-1-0'::date;
> date
> ------------
> 2000-01-01
We've interpreted that like that since 7.4, without complaints; and
I think it was an intentional change then (since 7.3 doesn't accept it).
I do not recommend changing it.
regards, tom lane