[VoIP] DST change in Windows

[Jayson Smith]

Hi,
See http://www.bluegrasspals.com/dst.html
This is a piece I wrote on this subject in February. It offers tzedit.exe
for download, and the tzedit.exe I offer has worked, for me, on 98SE and XP
SP2 systems alike. I have heard that once you're done with tzedit, you have
to go into Control Panel, Date/Time and reselect your current timezone. I
have a feeling that the reason for this is that Windows keeps a hidden copy
of the parameters for your current timezone somewhere else, and reselecting
the current timezone updates that extra copy with the newly edited values.
Jayson

----- Original Message ----- 
From: "Chad Perkins" <chad at maine.maine.edu>
To: "Voice Over IP Tandem for Analog Switches" <voip at ckts.info>
Sent: Sunday, April 08, 2007 2:54 PM
Subject: [VoIP] DST change in Windows


> I appreciate the fact that Steph has played "time" monitor (DST and
otherwise) on a
> number of lists.  Having peoples clocks reasonably correct help the
list(s) run
> smoothly.  A lot of people, would be unaware that something was amiss,
myself
> included, if Steph hadn't pointed it out (he caught me with a out of whack
clock
> before on another list before the DST crap came to be).
>
> However,
>
> On 6 Apr 2007 at 15:47, Steph Kerman wrote:
> [snip]
> > One needs to turn off auto-adjustment by unchecking the box and if
> > correcting manually one needed to bump the time zone and then correct
> > the time setting.
> > Steph
>
> Fix it, disabling DST is not the answer.  There has been a MS tool called
> TZEDIT.EXE that has been around since atleast windows 98 that "fixes" this
problem
> without the MS "patch".
>
> There are two versions of TZEDIT, one for Windows 9x, one for
XP/2000/NT(?).  So
> there is no reason that anyone shouldn't be able to fix this problem.  I
have used
> TZEDIT, I believe successfully, on all of my machines both at work and at
home (XP
> SP1, ME, 98SE, 95A and 95B none of which appear to be patchable).  Steph,
can
> you confirm if this message is properly "dated" ?
>
> Download the appropriate TZEDIT.EXE and run it (there is no installer).
> Select your timezone.
> Click Edit.
> Set 'Start Day' to Second Sunday of March
> Set 'Last Day' to First Sunday of November.
> (leave/turn 'Automatically set DST on)
> Click 'OK'.
> Click 'Close' and you are done (assuming other aspects of your time
settings haven't
> been already mucked up, in which case you'd have to undo that).
>
> Failing to fix the DST definition WILL cause future failures of correct
time unless you
> plan on manually correcting the clock every March and November for the
rest of your
> life, or have some other program sync the time all the time.
>
> While I am not an expert in this department, but I have been told that NTP
uses delta
> UTC and thus relies on the client to correctly interpret the offset.  As
such it is my
> understand that using NTP won't fix this (but it would be accurately "off"
by an hour
> one way or another).
>
> Chad
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