Apple's KB article doesn't specify WHAT local changes happened in between the "National Standard" that is implemented in 10.4.5 and the update that is available for 10.4.8 (and 10.3.9) users.

Does anyone know?

None of this is a concern if you live in Arizona, which I do, thankfully.

In this, the information age, why the USA continues with observence of DST is just absurd. The concept is like a magician's sleight-of-hand trick, or a temporal version of robbing Peter to pay Paul. No one really gains anything.

I cannot help but chuckle quietly as I see all those wrist watches that change time automatically.....and have no way to update....makes me glad my watch still requires me to manually change it every month that has less than 30 days and every DST cycle. What were the IDIOTS in CONgress thinking?????????

Just call me Leemac

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Guest wrote:
I cannot help but chuckle quietly as I see all those wrist watches that change time automatically.....and have no way to update....makes me glad my watch still requires me to manually change it every month that has less than 30 days and every DST cycle. What were the IDIOTS in CONgress thinking?????????

Just call me Leemac

Some wristwatches can be updated, but yeah, that's kind of funny. The government was thinking we're in tough economic times, there is a global war going on, and so we need conserve our resources more. After all, that's the point of DST in the first place.

Why are they extending the time zone??? Will it save me some $$$$?

In case anyone was wondering, this site is a good summary of the big picture, from energy savings to the rationalle, even a little history.

If you have an atomic clock, set to detect DST automatically, the National Observatory master clock will send a DST signal at the right time and date, so no worries. Some watches pick up the master atomic clock signal, so no worries there. If your watch "knows" when the change *used* to happen, you can just turn off the auto setting and set the time yourself, just like your microwave, bathroom scale, and toaster.

If your VCR gets a time signal from the PBS station (like many do now), the PBS signal should set your VCR to the correct time. My VCR shows central time for some reason, even though I live in CA. And even though I set it to "manual time". Somehow the VCR always goes back to +6 instead of +8. Go figure.

Time to talk to William Andrewes about a sundial.

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Guest wrote:
None of this is a concern if you live in Arizona, which I do, thankfully.

In this, the information age, why the USA continues with observence of DST is just absurd. The concept is like a magician's sleight-of-hand trick, or a temporal version of robbing Peter to pay Paul. No one really gains anything.

See the history of Daylight Saving Time (no "s") at Wikipedia and Web Exhibits, among other sources.

What DST does is to allow people to have more daylight time in the evening and less in the morning. People will get home from work and have more daylight time for family activities, for example. They'll also save money on electricity for lighting.

The same could be done if businesses switched their hours, but that would be chaotic, at best, paralyzing at worst.

One should note that the "time zones" in the US didn't come about until after World War I. Early railroad had a terrible time keeping schedules, as the local time at various towns and cities could vary, even for towns a few miles apart.

I lived in Arizona in the early '70s. The rationale for Arizona not going on DST had two parts:

1. It's "southerly," so the day length doesn't change as much over the year.

2. When California goes on PDT, Arizona, on MST, is the same. Arizona is at the western edge of the MST zone.

(It's also interesting that, apparently--see the map linked below, part of Arizona does go on DST. It's in the NE corner and may reprent a Native American nation.

There are other states where the line dividing time zones goes through the state. In Indiana's case, only a little bit of the NW corner (near Chicago) and the SW corner are in the Central time zone. Those do go on DST, while the rest of the state does not. (Here's a good map that shows time zones.

There is hope for users still running Mac OS Classic! Check out this site:

http://www.marcelbrown.com/techbytes/2007/03/mac_os_classic_and_daylight_sa.html

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Guest wrote:
None of this is a concern if you live in Arizona, which I do, thankfully.

In this, the information age, why the USA continues with observence of DST is just absurd. The concept is like a magician's sleight-of-hand trick, or a temporal version of robbing Peter to pay Paul. No one really gains anything.

How, in the information age, can people still not know that DST saves energy? Tons of it. Others have already provided links so I won't bother, but it baffles me that some people still don't know that.

As for the computer clocks, I think we'll all be fine. The WORST thing that will happen is you'll have to reset your clocks twice. Annoying, but hardly the end of the world.

And correct me if I'm wrong, but everyone who has their clocks set to update itself based on some external server should be fine no matter what OS they're using, right?

Thanks for the command line info. I have all the latest DST updates in 10.4.8, but I am currently in Mexico and was worried my time would change on March 11th, but after trying your zdump I found my MacBook will do the right thing, change on April 1, as Mexico did not see fit to change with the US.

Thanks again.

You don't have to worry about this if you set the OS (X or 9) to set the time automatically using a time server, do you?

Congress was so "sure" that this would save energy that they left the possibility open to change it back in 2 years time.

There was a real energy bill that was defanged and rendered mostly toothless by the US Government last year. Twiddling with DST isn't really expected to make that much of an impact, and I wouldn't be surprised to see it reversed in 2 years.

Never mind that fiddling with DST pisses off your trading partners.

They left one little thing out.
If you live in a State that doesn't observe DST, when you issue the GREP command in Terminal, you will get no results.
Really puzzled me, until I got the idea to change time zone from Hawaii to somewhere else, like Central Time Zone and then you'll get a result back, and you can see that your Mac is up-to-date.

Dear Sir,
We have three atomic clocks and not one of them reset this morning to DST! We are on Central Time with signal coming from Colorado, I believe. (Computers are fine with the automatic patches.)

Any suggestions? Thanks. Jean

I found a explanation for the atomic clocks, cuz I've been searching all over since I have the same problem. looks like we just have to set our clock to a different time zone until it would usually do DST. hope this helps Tera


you have clocks that set the time automatically you will also need to check them to make sure that they have updated themselves correctly. Clocks that update themselves by coordinating with the atomic clock will update correctly, but some clocks have pre-programmed chips. If the clock was manufactured before the Energy Policy Act was passed two years ago, it will not update correctly. If you find that your clock has the wrong time you will have to reprogram it for a different time zone to compensate for the time change from March 11th to April 1st and October 28th through November 4th or the dates for the time change for the current year.