Re: AW: [HACKERS] Re: tinterval - operator problems on AIX

[Tom Lane]

Pete Forman <[EMAIL PROTECTED]> writes:
> It is fairly arbitrary what the answer to this question is: if six
> months is subtracted from a to give b, should a.local.hour =
> b.local.hour or should a.utc.hour = b.utc.hour?  If you want the
> former then set tm_isdst = -1 before calling mktime.

It's not arbitrary: we want the former.  Anything else generates
bug reports from people who expect "9/1/2000 - six months" to
produce "3/1/2000", not sometime late in the evening of 2/29/2000.

                        regards, tom lane