[Info-vax] Time change

[Michael Austin]

AEF wrote:
> On Mar 10, 2:09 pm, billg... at cs.uofs.edu (Bill Gunshannon) wrote:
>> In article <1c555380-f7e1-49e9-9773-1109df486... at e24g2000vbe.googlegroups.com>,
>>         AEF <spamsink2... at yahoo.com> writes:
>>
>>
>>
>>> On Mar 9, 5:30 pm, "Richard B. Gilbert" <rgilber... at comcast.net>
>>> wrote:
>>>> Michael Moroney wrote:
>>>>> JF Mezei <jfmezei.spam... at vaxination.ca> writes:
>>>>>> How is this implemented in alpha ? Does the system do a glorified
>>>>>> SYS$SETTIM to call a routine to execute at the next scheduled time
>>>>>> change ?  or is there some other type of mechanism that allows VMS to
>>>>>> schedule some event in the long term ?
>>>>>> Also, if I have an alpha that was shutdown during this time, when it
>>>>>> next boots, will it automatically change its time ?
>>>>> I had to deal with this during the last time change, to try to prevent
>>>>> the setback from happening automatically with software that really
>>>>> couldn't deal with it.
>>>>> (the following is true only if SYSGEN AUTO_DLIGHT_SAV is set to 1, and
>>>>> things like NTP time synch aren't enabled. What's the setting on your
>>>>> VAX?)
>>>>> The JOB_CONTROL process has a $SETIMR scheduled to expire at the time of
>>>>> the time change, and when it does, JOB_CONTROL sets the time according to
>>>>> the time zone rules.  It reads the info in when it starts up, and it has
>>>>> enough smarts to set the time right then if the time change happened when
>>>>> the system was down.
>>>>> $ ANALYZE/SYSTEM
>>>>> SDA> SET PROCESS/IND=E   !JOB_CONTROL
>>>>> SDA> SHOW TQE
>>>>> Timer queue entries
>>>>> -------------------
>>>>>   TQE                                                             PID/
>>>>> address                 Expiration Time                 Type    routine
>>>>> --------   -----------------------------------------   ------   --------
>>>>> ...
>>>>> 880EA380   00A93E1F.7B714530  1-NOV-2009 02:00:00.00   TSA---   0001000E   JOB_CONTROL
>>>>> SDA>
>>>>> Next time change will take place Nov 1 at 2:00 AM.
>>>>> You may notice that $SETIMR can schedule events to happen thousands of
>>>>> years in the future, if you can manage to keep your system up that long.
>>>>> Aside: Were you guys in Canada supposed to change your time this last
>>>>> weekend?  The date of the time change was recently changed.
>>>> It's politics as usual.  Changing the date of the time change is a
>>>> highly visible means for the politicians to show the people that they
>>>> are actually doing something!  ;-)
>>> Well, the recent fall-back change in the US was made because of the
>>> Halloween lobby. I don't know what moved the spring-ahead up, though.
>>> Might have to do with saving energy.
>> Yeah, that's what we keep hearing and it makes about as much sense as the
>> notion that Ben Franklin invented it to conserve candles.  I start my day
>> before the sun comes up and end my day after the sun goes down.  Where, in
>> that window, the real daylight appears has no effect on how much time I
>> spend using artificial lights.
>>
>> bill
>>
>> --
>> Bill Gunshannon          |  de-moc-ra-cy (di mok' ra see) n.  Three wolves
>> billg... at cs.scranton.edu |  and a sheep voting on what's for dinner.
>> University of Scranton   |Ú
>> Scranton, Pennsylvania   |         #include <std.disclaimer.h>
> 
> Bill,
> 
> Not everyone works like you do. I don't think it was only your
> productivity that Congress, and whoever else was involved, was
> concerned with.
> 
> Anyway, I think the reason given by some (for the spring-ahead,
> anyway, as I think it was the "Halloween lobby" that pushed for that
> big one-week delay in returning to Standard Time) is to save energy,
> whether it does or doesn't. In fact, I've read some claiming it
> increases energy consumption. I've also read claims that it reduces
> the overall number of highway deaths. AGAIN, I DO NOT CLAIM ANY OF
> THESE REASONS ARE TRUE, ONLY THAT THEY ARE WHAT ARE *****CLAIMED*****
> BY SOME.
> 
> Another thing to be careful about is that there are TWO issues here:
> 
> 1.) DST
> 
> 2.) The recent CHANGE in the DST rules.
> 
> I hope it is clear by context when I refer to one or the other. If it
> isn't, too bad.
> 
> Another reason I've read about is that businesses like DST because
> they think (whether or not this is true!) people will shop more in the
> evening if the sun is still up. Again, I'M NOT CLAIMING THIS IS TRUE.
> I'M JUST SAYING THIS IS ONE REASON I READ ABOUT. OK?
> 
> 
> According to <http://tf.nist.gov/general/dst.htm>:
> 
> "The rules for DST changed in 2007 for the first time in more than 20
> years. The new changes were enacted by the Energy Policy Act of 2005,
> which extended the length of DST in the interest of reducing energy
> consumption. The new rules increased the duration of DST by about one
> month. DST will now be in effect for 238 days, or about 65% of the
> year, although Congress retained the right to revert to the prior law
> should the change prove unpopular or if energy savings are not
> significant."
> 
> Just in case it hasn't sunk in yet: I AM NOT CLAIMING ANY OF THE
> REASONS PEOPLE HAVE GIVEN FOR HAVING DST ARE TRUE. THE PEOPLE MAKING
> THESE CLAIMS ARE SOLELY RESPONSIBLE FOR THEIR CONTENT. OKAY?
> 
> AEF


Okay.

and the study they used to come to the ridiculous conclusions that 
resulted in that "Act" were more than 35-40 years out of date.