Daylight Savings Time (DST)

Hi,
Can any body tell me what is Daylight Savings Time (DST)? What is its significance in Java?
Nischal

nrlz is of course pulling your leg (sorry to ruin your fun nrlz). DST is the system wherein clocks are set forward an hour in the spring and back an hour in the fall. It's significant in Java if you need to model it in your Java application.

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Daylight Savings Time (DST) fix in firmware

Yet another DST time has come and gone (well, not really, in that the router WRT54G thinks that time changed last weekend when it doesn't actually change until THIS weekend) with no firmware update for the new (well, not really, it's old now) legislation.

You will find that Linksys equipment is ok. But remember it's not professional equipment. You get what you pay for and the support proves it.

Daylight Savings Time (DST) - Sun JVM Upgrade Question

I am using JRun 4 Build 106363 on a MS Windows 2000 Server.
We have updated our Windows 2000 server for the new DST. I also
updated Sun j2sdk1.4.1_02 using Sun Java SE TZUpdater Tool.
Do I have to upgrade to Sun's JVM version 1.4.2_11 (see link
to technote below) or will the steps I've already taken ensure
correct DST date/time handling?
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=d2ab4470

You need to upgrade to 1.4.2_11.
Ted Zimmerman

Australia 2008 Daylight Savings Time DST Changes

Lasy year some Australian states changed the Date that DST is ended, from 30th March to the 6th of April:
See for details: http://www.lawlink.nsw.gov.au/lawlink/cru/ll_cru.nsf/pages/cru_daylightsaving
I can find patches for the 2006 change made to accomodate the commonwealth games, but can not find patches for the changes that come in to effect 2007-2008.
Anyone know where these can be found (I assume they exist).
Thanks in advance,
John

The JDK download page has a timezone updater that you can download. Each new Java version contains updates to the tz rules, your version may already include what you want.

10.3.9 Daylight Savings Time Problem (DST Patch applied), it was working

We have about 30 Macs running 10.3.9, all of which were patched last year with the DST patch (2007). They are all configured to set the date and time automatically using time.apple.com. The user account used by the people using them is a non-administrator account.
Since Daylight Savings Time changed in March 9, 2008, they correctly changed their time until late last week (end of March), when several of them went back to the old time. If I open the Date & Time System Preference Pane and authenticate, the clock changes to the correct time, without any further input from me other than authenticating as the admin. Once changed, some but not all go back to the incorrect time about a day later.
Any ideas? I am trying to see if there is a simpler solution that resetting PRAM, throwing away cache files, etc.
Other machines running newer versions of the OS don't have the issue.
Thanks in advance for any input and/or advice.

hypermouse1, welcome to Apple Discussions.
How long has it been since you changed the internal memory battery? Check this site for battery part numbers and sources.
Mac PRAM, NVRAM, CUDA/PMU & Battery Tutorial
http://www.geocities.com/texas_macman/pram.html
 Cheers, Tom

DST-2007 Daylight Savings Time Patches for MAC OS

I have found Daylight Savings Time patches for other platforms.
Is there a patch for Daylight Saving Time for MAC OS?
Thanks.
Bev

markpb91 wrote:
Coffs Harbour, northern NSW along the coast. So I'm on Sydney AES time.
Beautiful part of the world! I have under Date and Time in System Preference marked as such
Date and Time    South Asia (have set automatically unticked)
Then Time Zone set for Australian Eastern Daylight saving time
                                   Melbourne - Australia    (I'm in Ballarat)
                                   With set time automatically up the top unticked
They are the settings I have always used and my computers have always reverted to and from Daylight savings (except of course I'm in Queensland, Then I have to reset my location and remember to set it back.
Other than that if may come down to trashing your pref file for date and time.
Good Luck

IdM Scheduler and Time Change to Daylight Savings Time GMT to BST

This isn't really a 'question' , but just a topic for discussion.
We're not live yet, but will be by the time the clocks go back. So I'm just interest to hear everyone's experiences and any issues with regards to the switching to / from DST
I did some "interesting" (or not) tests last night to see what happens with Pending Values which are due to take effect at the time change threshold of 01:00 GMT when switching to Daylight Savings Time (BST) GMT +0100.
It seems as if the IdM scheduler keeps going according to UTC or GMT. However any values provisioned to target systems or to local tables using the ddm.datetime8601 system variable are in local time according to the runtime server or SQL server's locale settings.
I set up a task to output from a javascript the current system date
using the following in the functions.
currentTime = new Date();
return currentTime.toString(); // returns Locale Time String
currentTime = new Date();
return currentTime.toUTCString(); // returns UTC Time String
in the same pass I also output the ddm.datetime8601 system parameter and the ddm.time24 system parameter.
This task was to update a comment on an entry and Scheduled to run at 00:00:00 and was executed at 00:00:06 GMT all times were still in GMT as expected.
Local Time: Sun Mar 27 00:00:06 GMT-0000 (GMT) 2011, UTC Time: Sun, 27 Mar 2011 00:00:06 GMT, ddm.datetime8601: 2011-03-27T00:00:06, ddm.time24: 00:00:06
This task was scheduled at 01:00:00 in IdM and was exectued at 01:00:08 GMT by the runtime, and you can see the local time is being correctly reported as 02:00:08 BST. Note also the ddmdatetime8061 is also 02:00:08 i.e. BST.
Local Time: Sun Mar 27 02:00:08 GMT+0100 (BST) 2011, UTC Time: Sun, 27 Mar 2011 01:00:08 GMT, ddm.datetime8601: 2011-03-27T02:00:08, ddm.time24: 02:00:08
In the database the entry values MXI_VALUES ModifyTime field has the GMT / UTC timestamp.
I also set up some pending value objects to be applied at 00:59:59 and 01:30:00 to see if the 01:30:00 would be 'skipped' as the locl clock change would've gone from 00:59:59 to 02:00:00. Well the pending values were correctly applied and expired and no 'lost' transactions happened as a result of the change.
So essentially it seems to me that the IdM runtime and scheduler times are all based on UTC / GMT.
I guess it's only an issue twice a year if you're expecting something to happen at a specific local time 01:00:00 or if you've got a global user base and their account expiry should be in each user's own country's local time. In these cases, it would seem that you'd need to convert the schedule times and pending value times to UTC first before setting them in the database.
Has anyone else had any issues, thoughts, questions or suggestioins on scheduling tasks which span the DST time change when switching to and from Daylight Savings Time.
Edited by: Paul Abrahamson on Mar 27, 2011 10:51 AM

Read here:
http://www.appleinsider.com/articles/10/10/11/applesays_ios_software_update_to_fix_pesky_alarm_clockbug.html

Multiple instances spawned after daylight savings time change

This is a known issue and there is an SAP Knowledge Base Article created on this issue:
1448881 - Multiple instances spawned after daylight savings time change
Below is the information from the SAP Knowledge Base Article:
Symptom
Scheduled reports that are supposed to run once a day, run multiple times.
Duplicate instances are being created.
Environment
BusinessObjects Enterprise XIR2 SP5
BusinessObjects Enterprise XIR2 SP5 + FP5.x
Reproducing the Issue
A report is scheduled to be run on a daily basis - this is a Recurring schedule.
Normally the report runs once a day, at a particular time.
After Daylight Savings Time change, the report runs at the specified time, but immediately after the successful instance, another instance is spawned.
Many more instances spawn after each instance completes.
Cause
This is a known issue: ADAPT01318487. This issue is because of DST and how our code handles this change.
Resolution
There is currently no known fix for this issue. There is however a script that can quickly resolve the problem.
The issue it seems is related to Daily recurring schedules.
What this script will do:
it will run a query to display all your DAILY Recurring jobs
you will have the option to choose your jobs and reschedule them by 1 hour
you will then highlight the same job and change them back by 1 hour
by modifying the schedule times, you are modifying the schedule itself and this will keep the issue of duplicate instances from occurring.
Exact Steps to Complete:
Stop the Job Servers.
Double click on the .hta file.
Change the System Name to that of your CMS name.
Add the Administrator's password.
Click Logon.
Click List All Recurring Instances.
Select All.
Make note of what it says in: Schedule Selected Recurring Instances: Should be 1 hr earlier.
Click Reschedule Selected Recurring Instances.
Choose All instances again and change Schedule Selected Recurring Instances to 1 hour Later.
Click Reschedule Selected Recurring Instances.
Now start your Job Servers.
The issue should not occur again.
The Script is attached here, but please review the SAP Knowledge Base article 1448881 as well

Hi Nicola,
- The multiple spawned instances issue ONLY affects XI3 SP3+ only. For XI3 SP1 and SP2 all Fix Pack levels this is not an issue as it was introduced as a problem in SP3.
- 1568239 notes the Java version and can apply to all O/S environments and is updated to reflect that.
If you are located in Europe you can also apply the patches in advance of the DST change to avoid the problem. If you are in Americas at this point utilizing the clean up scripts for this year is the approach needed to clean up the spawned instances and reschedule the existing schedules.
Thanks,
Chris

Daylight Savings Time and Alarmsk

Since the daylight savings time updated over the weekend the alarms I had programmed on my iPhone will not set properly. The phone displays the correct current time so I know the clock has updated but any alarms I have set for the hour of 2am - 3am don't display the proper time. They keep reverting to 1-2am. I have deleted them and recreated them with the same results, on 2 different iPhones, a 4gig and an 8gig.

I see im not the only one that gets up early. v1.1.3 and updated to 1.1.4 I am unable to set the alarm to any time in 2AM (2:01, 3, 4, 5, etc..) any time set to 2AM shows 1AM in the alarm. 2PM shows fine. Any hour of the day shows fine. The error is setting a time of 2AM as it will not show that time and will revert to 1AM.
I am in a zone that uses DST.
I guess apple doesnt want us to wake up to pay the bills.
I hope someone has a fix for this before I goto bed... busting out the old alarm clock now.

Energy Act of 2005 and Daylight Savings Time

We currently use Sun Studio compilers. We use the embedded tools.h RogueWave libraries. The Energy Act of 2005 changes the dates for Daylight Savings Time starting in 2007. Will there be any patches from Sun to handle this? We currently use RWZoneSimple which is extensible, but we were hoping for an update from Sun.
Thanks in advance. Sorry if this has been covered, I just couldn't find anything.
Further Reading:
http://en.wikipedia.org/wiki/Energy_Policy_Act_of_2005

The RW Tools.h++ library that comes with Sun Studio has been updated with the new DST rules. I don't think the patches have been released yet.
If you have a service contract with Sun, you can get a pre-release version of the patch via your support channel.
Otherwise, check the Sun Studio patch page from time to time
http://developers.sun.com/sunstudio/downloads/patches/index.jsp
Look for a C++ compiler patch that includes a fix for bug 6456479.
RW Tools.h++ does its own DST calculations. Other libraries rely on the Solaris functions in libc. Patches for Solaris are available now as follows:
S10 - 118833-24(sparc), 118855-19(x86)
(The fix is included in S10u2.)
S 9 - 112874-34(sparc), 114432-24(x86)
S 8 - 108993-62(sparc), 108994-62(x86)

CUE timezone and daylight savings time

Hi,
Having issue where CUEs don't seem to be adjusting for daylight savings time. Timezone is set correct to EST but is a hour off because its daylight savings time now. The router and CUE are configured to use same NTP server and router has summertime setting and adjusts for DST fine and has correct time but CUE is a hour behind, like it is not doing DST.
Were on version 2.2(2) of CUE software.
This is also in indiana where the laws changed recently so maybe that has something to do with this.
Any ideas?

Very likely due to the change in Indiana. A workaround would be to change the timezone to an EST zone that observes DST such as America/Louisville (Eastern Time - Kentucky - Louisville Area).
Hope this helps.
Brandon

SimpleDateFormat and Daylight Savings Time

I am trying to parse into a Date "April 15 1999" with "MMM d YYYY" using SimpleDateFormat. This string parses w/out error and the resulting Date is: Thu Apr 15 00:00:00 PST 1999. This is correct in that I am in California. The problem is that 4/15 is Daylight Savings Time in 1999. The getTimeZone result for the parent DateFormat is "SystemV/PST8PDT". I have wrestled with this for over a day now, I admit it, I need help.
Anyone have any ideas what could be happening here?
Thanks
Roger

When I run BigDaddy's code I get MST for the TZ (which is correct, my default is Mountain TZ and we don't observe DST. By this I surmise that BDLH's default is Pacific TZ and that it observes DST. The following code shows the setting of the TZ to "America/Los_Angeles" and produces the correct result. Windows XP.
import java.text.*;
import java.util.*;
public class PTest {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("MMM dd yyyy");
        Date dte = sdf.parse("April 15 1999");
        System.out.println(dte);
        SimpleDateFormat sdf2 = new SimpleDateFormat("MMM dd yyyy zzzz");
        sdf2.setTimeZone(TimeZone.getTimeZone("America/Los_Angeles"));
        System.out.println(sdf2.format(dte));
}

COREid and Daylight Savings Time for 2007

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?
Background:
In August of 2005 the United States Congress passed the Energy Policy Act,
which changes the dates of both the start and end of daylight saving time
(DST). When this law goes into effect in 2007, DST will start three weeks
earlier (2:00 A.M. on the second Sunday in March) and will end one week later
(2:00 A.M. on the first Sunday in November) than what had traditionally
occurred.
Thanks,
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

Daylight Savings Time in Calendar Bar

I am in Australia and we have also adjusted the clocks to Daylight Savings Time -
I am using an Iphone 5 with IOS 7.0.2 and all settings are set to time zone Sydney, in both Date and Time and Calendar.
The calendar shows the correct time at the top of the screen but the red bar that identifies the current time is showing pre DST - quite bizzare?
My Ipad is showing the same as is my wifes Iphone 5 (also updated with IO7)
I suggest this is an IO7 glitch/bug - anyone with a solution?

It's not just an hour late issue. My 3GS alarm went off an hour early this past Saturday. I tried to reset the alarm for the desired time and it didn't go off. Then my girlfriend's alarm on her 3GS did go off an hour late this morning.

IPOD and Mac did not properly adjust for Daylight Savings Time

Hi, I have noticed that my iPod and my Mac Mini do not appear to have the latest update for Daylight Savings Time. There were a few adjustments this year that do not seem to be reflected on the Mac devices ??? I was using my iPod for time and was thrown off when time change before DST went into affect.

So, in your system preferences on the mini, under Date and Time, you have the box checked that says "Set date and time automatically"? Then, on the time zone tab, you have selected your correct time zone? I typically leave the box there unchecked that says to try and set automatically using current location.

Daylight Savings Time (DST)

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