How to fix daylight savings time switch

Times jumped ahead several weeks ago for daylight savings time, and I dont know whether to change them all manually or not.

thanks for responding ; I just changed all my entries after Sunday manually just now. I'd waited over 36 hours and it hadn't adjusted. Sure hope this doesn't happen everytime there's a time change -- I don;t remember it happening before.

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Daylight savings time switch

Hello Group,
OSS note 1603349 describes how a SAP system can be active during time switch from summer time to winter time.
Has someone experience to let the system up?
Kind Regards
Winfried

Hi Winfried,
perfect solution )
We do this with many customers (on iSeries as well) and it really runs "out of the box" on ERP6.
Once, I really saw it live at an US customer and it looked "really bizzarre" in System->State ...
Regards
Volker Gueldenpfennig, consolut international ag
http://www.consolut.com http://www.4soi.de http://www.easymarketplace.de

HOw do I fix the fact that ical jumped (almost) all my events post daylight savings time change an hour ahead?

A few weeks ago I noticed that everything past 3/8 was an hour ahead, and I assumed once daylight savings time changed it would all jump back. It hasn't, and I don't know how to continue scheduling events or if I should change them all. I read that (a few years ago) the suggestion was give it 24 hours to adjust??

I think this problem is more complex. Background - UK clocks went back at the end of October; the USA went back one week later. I am in the UK and my Outlook calendar contains appointments created in the USA.
Someone in the USA created a recurring appointment before any clocks went back. In Outlook everything is correct. The meeting times are the same each week except for the one week between the two clock changes when, quite correctly, the meeting shows up one hour earlier. When I sync with my iPhone, the meeting shows at the same time every week regardless - this is incorrect.
Someone in the USA created a recurring appointment in the week after the UK clocks went back but before the USA clocks did. Outlook correctly shows the first occurrence as one hour earlier than all the following occurrences. Unfortunately - and this is the really nasty bit - the iPhone shows ALL the appointments one hour earlier than they should be. The only one that is correct is the first one.
This is a nasty bug and something that Apple needs to fix.

How to determine if daylight savings time change will occur automatically

Can any one assist me in determining if a daylight savings time change will occur automatically, or if it will require manual intervention

Your operating system controls your "clock" and any running application only "uses" what it is told.
Not a QuickTime issue. It's up to the user to set the clock.

Daylight Savings time, and how dates are stored internally and displayed

This is probably a question that appears here annually, but I couldn't really find clear answers, so I'll try asking this in my own words:
I'm in the Eastern timezone, and this Sunday, we'll be turning our clocks back an hour at 2:00 AM. That means that accordign to us humans, the time 1:30 AM will occur twice on Sunday.
I've got an Oracle application that runs every 5 minutes around the clock, and it selects records from a certain table whose updated timestamp (TIMESTAMP(6)) is greater than SYSDATE - 5/1440, meaning any record that was updated in the last 5 minutes. Will we have a problem with some records being processed twice on Sunday morning? I'm theorizing that everything will be OK, that internally, Oracle stores DATE fields using something like an epoch which then gets interpreted when we display them. An epoch value will continue to grow each second no matter what “time” it is according to the U.S. Congress.
A simpler way to look at the question might be as follows:
If you store SYSDATE in a DATE column in row “X” at 1:30 AM before the time change, and you store sysdate in row “Y” exactly one hour later, will Oracle say that X’s timestamp is 60 minutes less than Y’s timestamp? All fields that are related to my particular situation are either DATE or TIMESTAMP(6).
We use 11g.

>
That settles that! Thank you! My theory was wrong! I appreciate the help.
>
You may think it settles that but, sorry to burst your bubble, that doesn't really settle much of anything.
One thing that was settled is the answer to this question
>
But are they talking about what you can EXTRACT and DISPLAY from the field or what is actually STORED internally?
>
which is, as Mark stated, they are talking about what is stored internally.
The other thing that was settled is that you will pull the same, or mostly the same, data twice during that one hour. I say 'mostly the same' because of the major flaw your extraction method has to begin with.
>
If you store SYSDATE in a DATE column in row “X” at 1:30 AM before the time change, and you store sysdate in row “Y” exactly one hour later, will Oracle say that X’s timestamp is 60 minutes less than Y’s timestamp?
>
No - they will have the same time since 'one hour later' would have been 2:30 AM but the clock was turned back an hour so is again 1:30 AM. So the second time your job runs for 5 minutes at 1:30 AM it will pull both the original 1:30 AM data AND the data inserted an hour later.
And Oracle will say that data stored in row "Z" exactly 45 minutes later than "X" at 1:30 AM will have a date of 1:15 AM and will appear to have been stored earlier.
Your method of extracting data is seriously flawed to begin with so the daylight savings time issue is the least of your problems. The reason is related to the answer to this question you asked
>
do people avoid using DATE and TIMESTAMP datatypes because they are too simple?
>
That method isn't reliable - that is why people avoid using a date/timestamp value for pulling data. And the more often you pull data the worse the problems will be.
>
I've got an Oracle application that runs every 5 minutes around the clock, and it selects records from a certain table whose updated timestamp (TIMESTAMP(6)) is greater than SYSDATE - 5/1440, meaning any record that was updated in the last 5 minutes
>
No - it doesn't do that at all, at least not reliably. And THAT is the why your method is seriously flawed.
The reason is that the value that you use for that DATE or TIMESTAMP column (e.g. SYSDATE) is assigned BEFORE the transaction is committed. But your code that extracts the data is only pulling data for values that HAVE BEEN committed.
1. A transaction begins at 11:59 AM and performs an INSERT of one (or any number) of records. The value of SYSDATE used is 11:59 AM.
2. The transaction is COMMITTED at 12:03 AM.
3. Your job, which runs every five minutes pulls data for the period 11:55:00 AM to 11:59:59 AM. This job will NOT see the records inserted in step #1 because they had not been committed when your job query began execution - read consistency
4. Your job next pulls data for the period 12:00:00 AM to 12:04:59 AM. This job will also NOT see the records inserted in step #1 because the SYSDATE value used was 11:59 AM which is BEFORE this jobs time range.
You have one or ANY NUMBER of records that ARE NEVER PULLED!
That is why people don't (or shouldn't) use DATE/TIMESTAMP values for pulling data. If you only pull data once per day (e.g. after midnight to get 'yesterdays' data) then the only data you will miss is for data where the transaction began before midnight but the commit happened after midnight. Some environments have no, or very little, activity at that time of night and so may never have a 'missing data' problem.
Creating your tables with ROW DEPENDENCIES will store an SCN at the row level (at a cost of about 6 bytes per row) and you can use the commit SCN to pull data.
Just another caveat though - either of those approaches will still NEVER detect rows that have been deleted. So if you need those you need yet a different approach such as using a materialized view log that captures ALL changes.

Daylight Savings Time and Time Zone Issue:

Howdy! Many of us woke up this morning to be dismayed to find that our iPhone was TWO hours behind instead of falling back one for the Daylight Savings Time adjustment, and were late for church. I have an iPhone 4S, with iOS 5...
I was working at that time of morning, and the initial switch went well. However, when I woke up, the clock was yet another hour behind. A little investigation showed that the Time zone had been changed to Denver (It was previously on Chicaco, and I live in Dallas.) I tried to select it to change it, and it wouldn't allow me. If I turned off the Set Automatically feature, then I could change it, but when I turned the Set Automatically feature back on, it would re-set the time zone to Denver.
I found another thread where they discuss this:
https://discussions.apple.com/message/16644669
To fix this, put in airplane mode, then back out again, then re-choose your correct time zone. If this doesn't work, then try turning your phone completely off and then on again. Thanks to 4n6doc for the tip!
The airplane mode trick worked for me: I turned airplane mode on, then off, then went to the Date & Time and set my time zone to Dallas, TX while the Set Automatically was off. When I turned the Set Automatically back on, it changed Dallas to Chicago, which is what every iPhone iOS I've ever had has done.

Hi,
Yes this is a correct way to fix the issue. One thing however, how did you set the timezone? For correct daylight saving handling, you'll have to use the long version, like America/New Yorw, NOT GMT-5 (for example).
regards,
~ Simon

N8 Daylight savings time huge problem

I live in Jordan and daylgiht savings is activated on April 1st (the phone time is set to jordan) but today/yesterday (march 25th) it activated daylight savings increasing one hour on the time, the problem is that everytime I adjst the time (decrease 1 hour) it automatically increases another hour making it impossible to fix the time (auto time updates are off).
*noite: i can change the minutes but not the hours
so bascially does anyone else have this problem?? and do you have idea how to fix it
If you found this post or any other psot helpful please press the green kudus star

We will get somebody to look at this incorrect date for the time change, many countries that use daylight savings time do so from the final Sunday of March, which would appear to explain your premature switch in Jordan where you are using a different date for the switch.
With regard to the way the time zone is shown, Symbian phones always show your local time in relation to GMT/UTC, which doesn't include any daylight savings calculation, so for example here in Finland, my N8 shows GMT+3, but once we switch back to normal time in September that will revert to GMT+2.
If this or any post answers your question, please remember to help others by pressing the 'Accept as solution' button.

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

CF MX and Daylight Savings Time Change

Next year 2007, the Daylight Saving day (chaning the clocks
for spring and fall) will be changing. The Spring date will be a
month earlier and the fall date a month later then it has been for
years.
How will the Cold Fusion Server for MX 7+ handle this? Will
it use the server time or use the internal CF Server clock?
Thanks.

My problem is that now CFMX 6.1 thinks that it is 8 hours
later in the day
than it really is (it is stuck on GMT now) and I am unable to
get CFMX to
acknowledge the operating systems clock. :-(
"GregK" <[email protected]> wrote in message
news:eord35$5mq$[email protected]..
The technote for this issue:
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=d2ab4470
has
another
link to a technote which addresses null pointer exceptions
after upgrading
the
JVM on CFMX 6.1 systems:
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=kb400232
The hotfix
described in that technote gives a fix for CFLDAP and
CFSERVLET tags after
the
new JVM is installed.
The important thing to note is that Adobe feels that
daylight savings time
will indeed present a problem for ColdFusion applications.
Unfortunately,
the
problems are not explained in any detail. I can guess that
functions like
DateDiff( ) may calculate incorrect values when spanning the
changed weeks
of
daylight savings time. As others have suggested; however,
simply retrieving
the system time, i.e. Now( ) function may not be affected as
long as the
operating system clock is set correctly.
Hope that helps.

All-day calendar entries and daylight savings time

Since changing to daylight savings time, whenever I change the date on an all-day calendar entry, my iPad (but not my iPhone) changes the one-day calendar entry to a two-da calendar entry. How do I correct this?

Dates are represented internally with a long that represents the number of milliseconds past some fixed point. Timezones do not affect this.
I'm assuming you're getting your dates as java.sql.Date
You should then build a Calendar (see GregorianCalendar) and call setTimeZone() with your timezone without daylight savings

Daylight Savings Time...Again

It's the semi-annual file synchronization crisis, brought to you by Adobe and Daylight Savings Time, now in its nth year!
My entire 4000+ page site has gone out of synch with my local files due to daylight savings time. Apart from spending hours uploading the entire site, what can I do to maintain proper synchronization? I'd love to see an official tech note addressing this issue. BTW, I do not have any authority over the server to which I post files, so I can't make changes to how the server's timestamps are administered.
Any solutions/suggestions would be appreciated!

I've no solution, but just wanted to post to share your frustration. This has been a problem with Dreamweaver for years, and is frankly a major PITA. You'd think such an expensive product worked on by so many coders would have squashed this bug ages ago, but no, plainly the coders can't write simple code which would detect when Daylight Saving kicks in and offer you the option to 'fix' the synch such that files whose timestamps are exactly an hour behind/ahead would be marked as synched. It's not as if it's a tough algorithm, after all. Sadly, DW has become baroque bloatware since being taken over by the Adobe corporate behemoth, which seems intent on building in pointless features so as to generate sales from those eager to keep up with the latest version. I use it because my employer's bought it, but there's no way on this green earth I'd shell out for such a poor product if I had to pay out of my own pocket.
Just my 2 cent's worth...
Fred
PS: Oh, and here's an 'issue' for the board admins. Hitting reply in Firefox 4 doesn't generate this HTML editor, but instead everything just hangs. I've had to go into Safari to reply. No big, it just adds a few mm to the blood pressure and makes the poster even more cross.

ICal issues with Daylight Savings Time

After Daylight Savings Time some of my appointment in iCal have automatically changed to one hour later. This did it happen to all of them which makes it quite confusing. I think that it was mostly the recurring ones. Any ideas on how to fix this? I don't recall this happening in previous years. A couple things that may be in play. My iCal is linked to a google calendar but I make the vast majority of my appointments through iCal. I have noticed that some appointments show up in CEntral Time and others in GMT. Could this be a factor. How do I get that timing consistent? Thanks for your help.

Yes we did power down and then back up with all three. We also called each phone to see if that would help. I just had a thought ... would removing the battery help? I've had verizon phones for many years and I"ve never had this happen.

AIX 6/7 U.S. Daylight Savings Time bug

I saw announcements this past Friday and yesterday about daylight savings time bug on IBM AIX and thought this news might be important to pass around, as the time changes in the U.S. this coming weekend, and the fix requires a system reboot.
Possible Action Required: System time may not change properly at DST start/end dates on AIX 7.1 and AIX 6.1
[http://www-01.ibm.com/support/docview.wss?uid=isg3T1013017&myns=pwraix61&myne=E|http://www-01.ibm.com/support/docview.wss?uid=isg3T1013017&myns=pwraix61&myne=E]

> Apparently, this is far more complicated than either of us might think. I've heard that from several people.
I don't want to simply sound argumentative (I'm NOT attacking you in any way here), but without some sort of specific evidence of why this would be a complicated issue to fix, I have difficulty believing this. It's easy to say "it's more complicated than you would think," but where is the evidence of this? Where is the statement from Adobe saying that they know about this issue? Where are the examples from the people you refer to that explain why Lr can't do with dozens of other apps -- many of them FREE -- can do without this problem? Are we really supposed to believe that displaying the date/time correctly is so complicated that it's going to take Adobe over a YEAR to fix it?
We're talking about displaying some text from a standard tag. When it comes to this sort of application, it doesn't get much simpler than this. Lr doesn't have to "calculate" anything -- it just has to display the data in this field. How is this any different than displaying the data from any other field. Why is Lr applying an "adjustment" to a field that doesn't need it? Exactly what is the theory behind this being difficult?
Thanks for your feedback,
Larry

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

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.

How to fix daylight savings time switch

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