TimerThreads and daylight saving time

I have this task that I need to do everyday at 0:00 AM.
I am using the ScheduleAtFixedRate method to perform this starting it at 0:00 AM and running it again every 24 hours. It is very important to run at 0:00 because it involves money a a reconciliation file.
According to the API documentation:
Fixed-rate execution is appropriate for recurring activities that are sensitive to absolute time, such as ringing a chime every hour on the hour, or running scheduled maintenance every day at a particular time.
My question is what about daylight-saving time ? What happens to such a task that is supposed to run every day at 0:00 ?
Thanks
Luis Cordeiro

My guess, and it is just a guess, is that the task will run every 24 hours, and therefore after a daylight saving time switch you will find it running at 01:00 or at 23:00. But I would suggest you test for yourself. Set up a test program that schedules a task every 3 hours, change your system's date and time to be 5 hours before the end (or start) of DST, and see what happens after it runs for 6 hours.

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Oracle WebLogic Server (WLS), Time Zones, and DayLight Saving Time (DST) Changes

Hello,
We are approaching this time of the year again...
I would like to redirect you to the Support Note 1370083.1 "Oracle WebLogic Server (WLS), Time Zones, and DayLight Saving Time (DST) Changes"
This note lists what is to be expected from WebLogic Server regarding this time change period, in terms of behavior, both for the engine and the applications deployed onto WLS.
Regards,
Patrick.

Probably this:
http://www.jdocs.com/castor/0.9.5.3/api/org/exolab/castor/xml/handlers/DateFieldHandler.html

Java 1.4 and Daylight Saving Time 2007

The current version of Java 1.4.2 for Tiger, 'Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_09-244)' does not handle the new 2007 Daylight Saving Time rules correctly. Will Apple be updating Java 1.4.2 to the version that does support 2007 DST correctly? (at least 1.4.2_11 is required per Sun, http://java.sun.com/developer/technicalArticles/Intl/USDST/).
If so, when? Thanks!

Since you didn't list your computer, here's a link to Java 5.0 release 4 for both PPC and Intel-based Macs, which came out in April: http://search.info.apple.com/?q=J2SE50Release4.dmg&type=kbdload&search=Search&lr =lang_en&search=Go. That should solve your problem.

Clock UI control and daylight saving time.

Hi,
We have a customer that has several sites around the world.
In a VC-model I like to use the Clock UI control to display the times of the different sites.
This can be done by setting the time zone in the control properties.
A long ago we have introduced daylight saving time.
It seems that the clock control does not do anything with this ?
How can I change the time zone when the model is running ?
Can it be done by an expression and how ?
There is also a problem of the country, some have DST, others dont.
See http://en.wikipedia.org/wiki/Daylight_saving_time_around_the_world
Example:
I have 2 clocks and the end-user lives in Amsterdam:
Amsterdam, time zone = GMT + 1
Santiago, time zone = GMT 4
During the winter in Amsterdam it is summer in Santiago and has daylight saving so the time in Santiago should be GMT 3 in stead of GMT -4.

With the current version of VC / flash, it is not possible to display the correct time all the year 'round.
If you only want to show the (user) current time then you can use this VC clock object.
If you need to show clocks from different cities around the world, than its better NOT to use the VC clock.
Because you can not define the country and city in the clock properties, that determine the use of DST, it will not always show the correct (default / DST) time.
Solution:
Add a HTLM-view to your model with a links to a web clock.
Nice (free !) clocks can be found (and customized) on <a href="http://www.worldtimeserver.com/clocks/wtsclock001.aspx">worldtimeserver.com</a> or <a href="http://www.timeanddate.com/clocks/free.html">timeanddate.com</a> .
Example:
For the city Santiago (Chile) the URL =
http://free.timeanddate.com/clock/ielrw91/n232/tluk/fn13/fs16/fc009/tt0/tw1/td2/th1/ts1/tb4

TimeZone getDisplayName and Daylight Saving Time

Hi all,
Is this a good way to get "CST"/"CDT" accurately?:
// Determine whether or not we're in Daylight Saving Time
// (affects the CST/CDT/etc. printing in the output).
boolean isDst = false;
if (cal.get(Calendar.DST_OFFSET) != 0) {
isDst = true;
Thanks so much :-)

I'd use one of the TimeZone methods, for instance inDaylightTime(date); one of the other DST methods may work better for you.

Castor and Daylight Saving Time 2007 Changes

Hi,
Can anyone tell me if Castor will be affected by the changes to Daylight Saving Time (DST) in the US in 2007?
Thanks

Probably this:
http://www.jdocs.com/castor/0.9.5.3/api/org/exolab/castor/xml/handlers/DateFieldHandler.html

Problem with SLQ Date and Daylight Saving Time

Hi everybody!
It seems, that when I have a date in the database, which falls on start of the daylight saving period, it is converted to the previous date.
Example: '2001-10-13' will become '2001-10-12' after doing a date = rs.getDate() and then converting back using date.toString().
This caused a lot of trouble because the date value is part of an unique key constraint!
Currently I wrote a wrapper method, which obtains the date as string and converts this one into a date by setting the hours to 12:00.
Does anybody know a straighter way to avoid the conversion?

Because the default time zone is using day light saving time. To remove this feature, reset your default time zone at the very beginning of your program:
TimeZone.setDefault( new SimpleTimeZone( TimeZone.getDefault().getRawOffset(), TimeZone.getDefault().getID() );

Conversion mapping is losing time zone data during daylight saving time

We have a problem with conversion of Calendars to timestamp with timezone for the last hour of Daylight Saving Time (e.g. 01:00 EDT - 01:59 EDT) where it is being interpreted as Standard Time which is in reality 60 minutes later.
We've written a JUnit test case that runs directly against TopLink to avoid any issues with WAS and its connection pooling.
The Calendar theDateTime comes from an object called TimeEntry which is mapped to a TIMESTAMP WITH TIMEZONE field using conversion mapping with Data Type TIMESTAMPTZ (oracle.sql) and Attribute Type Calendar (java.util).
We are using:
Oracle TopLink - 10g Release 3 (10.1.3.0.0) (Build Patch for Bugs 5145690 and 5156075)
Oracle9i Enterprise Edition Release 9.2.0.7.0 - 64bit Production
Oracle JDBC driver Version: 10.2.0.1.0
platform=>Oracle9Platform
Execute this Java:
SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm z");
TimeZone tzEasternRegion = TimeZone.getTimeZone("US/Eastern");
Calendar theDateTime = Calendar.getInstance(tzEasternRegion);
theDateTime.setTime(format.parse("10/29/2006 01:00 EDT"));
Persist to the database and execute this SQL:
SELECT the_date_time, EXTRACT(TIMEZONE_REGION FROM the_date_time), EXTRACT(TIMEZONE_ABBR FROM the_date_time), EXTRACT(TIMEZONE_HOUR FROM the_date_time)
FROM time_table WHERE time_table_id=1
This provides the following results:
THE_DATE_TIME EXTRACT(TIMEZONE_REGION FROM the_date_time) EXTRACT(TIMEZONE_ABBR FROM the_date_time) EXTRACT(TIMEZONE_HOUR FROM the_date_time)
29-OCT-06 01.00.00.000000 AM US/EASTERN US/Eastern EST -5
The wrong time zone is in the database. It should be EDT -4. Let's test the SQL that should be generated by TopLink. It should look like the following.
Execute this SQL:
UPDATE time_table SET the_date_time = TO_TIMESTAMP_TZ('10/29/2006 01:00 US/Eastern','mm/dd/yyyy HH24:MI TZR') WHERE (time_table_id=1)
SELECT the_date_time, EXTRACT(TIMEZONE_REGION FROM the_date_time), EXTRACT(TIMEZONE_ABBR FROM the_date_time), EXTRACT(TIMEZONE_HOUR FROM the_date_time)
FROM time_table WHERE time_table_id=1
This provides the same results:
THE_DATE_TIME EXTRACT(TIMEZONE_REGION FROM the_date_time) EXTRACT(TIMEZONE_ABBR FROM the_date_time) EXTRACT(TIMEZONE_HOUR FROM the_date_time)
29-OCT-06 01.00.00.000000 AM US/EASTERN US/Eastern EST -5
Now, execute this SQL:
UPDATE time_table SET the_date_time = TO_TIMESTAMP_TZ('10/29/2006 01:00 EDT US/Eastern','mm/dd/yyyy HH24:MI TZD TZR') WHERE (time_table_id=1)
SELECT the_date_time, EXTRACT(TIMEZONE_REGION FROM the_date_time), EXTRACT(TIMEZONE_ABBR FROM the_date_time), EXTRACT(TIMEZONE_HOUR FROM the_date_time)
FROM time_table WHERE time_table_id=1
This provides better results:
THE_DATE_TIME EXTRACT(TIMEZONE_REGION FROM the_date_time) EXTRACT(TIMEZONE_ABBR FROM the_date_time) EXTRACT(TIMEZONE_HOUR FROM the_date_time)
29-OCT-06 01.00.00.000000 AM US/EASTERN US/Eastern EDT -4
The correct time zone is now in the database. Let's test reading this with the following Java:
System.out.println("cal= " + theDateTime);
System.out.println("date= " + theDateTime.getTime());
System.out.println("millis= " + theDateTime.getTimeInMillis());
System.out.println("zone= " + theDateTime.getTimeZone());
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cal= java.util.GregorianCalendar[...]
date= Sun Oct 29 01:00:00 EST 2006
millis= 1162101600000
zone= sun.util.calendar.ZoneInfo[id="US/Eastern",...]
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The conversion from java.util.Calendar to TIMESTAMPTZ loses the actual offset when setting to a regional time zone. It can maintain this info by specifying it explicitly.
The conversion from TIMSTAMPTZ to java.util.Calendar also loses the actual offset even if the correct offset is in the database.
Has anyone else encountered this conversion problem? It appears to be a conversion problem in both directions. I know that the Calendar is lenient by default and will assume Standard Time if time is entered during the repeated 1 o'clock hour at the end of Daylight Saving Time, but the Calendars we are using are explicit in their time, so this would be classified as data corruption.
Nik

Opened an SR. Looks like there is a problem with conversion either in TopLink or in JDBC.

Daylight Saving Time Patch in 10.2.0.4

Question:
When you apply the 10.2.0.4 patch (linux-64 bit), does this patch include the daylight saving time patch that needed to be applied in earlier releases?

I know that. I was looking for the readme file but my metalink account did not have access to it. I was hoping that the forum would fill in the gap for me.
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What is the best way to switch off Daylight Saving Time?

What is the best way to switch off Daylight Saving Time for a DST enabled timezone?

I've been looking through the related classes and can't seem to find a way to disable DST in any timezone. Probably because they couldn't think of a good reason to want to know what the non-DST time was during DST.
However, you could easily compute the time without DST if that's what you need.

Brazil Daylight Saving Time Problem

In Brazil, we enter the summer time and my blackberry 9800 torch automatically work, but when I synchronized with the playbook, some problems arose.
The time in the menu setting is correct, as you can see in this image:
But the wrong time remains the main screen:
Does anyone have the same problem and knows how to fix it?
tks,

It did not work.
It is indifferent to select manual or automatic, the problem persists.
I'm in Brazil and with the correct time zone, but we are on daylight saving time.
On the menu setting time and date, the time is right, however, in early 1 hour on application clock and and late 1 hour on the main screen.

Daylight Saving Time Changes in 2007 for USA

Can anyone give me solution how to handle Daylight saving Time changes in 2007 in USA for JDK 1.3.x releases? We are using this due to some vendor dependency. We can�t upgrade to higher versions up to middle of the 2007. I would be thankful if somebody gets back to me.

I have a similar issue where we cannot upgrade the jdk 1.1 without involving a lot of effort. If we keep the same old jdk, can someone tell me if use of Date and Calendar api will be impacted by the Daylight saving change.....provided the timezone is default and not explicitly set to EST. Also there isnt any timezone related buss logic.

Does BOXI 3.1 supports Daylight Saving Time (DST)?

Hi ,
Can any one tell me whether BOXI 3.1 supports Day Light Saving (DST), in case of scheduling reports?
Thanks in Advance,
Raghuveer.

Hi Reddy,
you can contact your vendor regarding this information ....
You need to appy the Business Objects patch, you will need to apply the extended Daylight Saving Time (EDST) patches for your operating system and Java Virtual Machine and Application Servers in order for the Business Objects patches to take effect. Please contact your vendors for updated information.
Regards
KP

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If one uses CreateODBCDateTime to convert a date into the
proper format for storing in a SQL Server database, and one runs
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I have several international web sites on this server, one of
which has over 100,000 users who have contributed over 70 million
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Do COREid or any of its components require any special fix in order to comply or function properly with the new Daylight Savings Time for 2007?
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In August of 2005 the United States Congress passed the Energy Policy Act,
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Craig
Message was edited by:
user557097

We have experienced many problems with DST and COREid in the past; most of them resulting in hung Access server and unavailability. I don't know if it's because we have components distributed across multiple time zones or what. Our plan is to have someone available at the time change to cycle the services (and maybe the server as a whole) and do a health check after the fact. I hope this helps.
--Aaron

TimerThreads and daylight saving time

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