In a recent note, Denis Gäbler said:
> Date: Fri, 2 Feb 2007 04:05:10 -0500
>
> in e.g. Linux there is a way to calculate the timezone for a remote user ba
> sed on definitions such as "Europe/Berlin", "North Amerika/Atlanta" and so on.
> This is also possible with Java on z/OS. We would like to eliminate the
> maintenance of our current DB2 table, which we query with e.g. "Tokyo" and
> the result of the query tells us the offset.
> Is there any other API than Java that supports that mechanism on z/OS? We
> need this service in our IMS regions and it would be memory eater to enable
> all regions for Java processing just for the sake of running a single
> statement.
>
As you have observed, most UNIX systems, other than the atavistic z/OS
Unix System Services, employ the zoneinfo database, described in
Linkname: Sources for Time Zone and Daylight Saving Time Data
URL: http://www.twinsun.com/tz/tz-link.htm
This database is distributed with the z/OS DCE product; you may
find it in:
/usr/lpp/dce/etc/zoneinfo
AFAIK, only DCE uses this, and Java uses whatever it uses. Ignoring
zoneinfo is a more serious problem with the changes in the Daylight
Saving Time schedule legislated in the U.S.: once the LE APAR
(PK24076 ?) is applied, time zone offsets for some dates on Fall,
2006 will be wrong; without the APAR time zone offsets for some
dates in Spring, 2007 will be wrong. Once we have the APAR applied
I'll start a PMR on the Fall, 2007, problem, and attempt this into
a Requirement for zoneinfo in z/OS Unix System Services.
-- gil
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