Re: DST in Windows
- From: "KenB" <kbrussel@xxxxxxxxxxxxxxxxx>
- Date: Wed, 14 Mar 2007 15:22:08 -0500
"John John" <audetweld@xxxxxxxxxxx> wrote in message
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KenB wrote:John-
"John John" <audetweld@xxxxxxxxxxx> wrote in message
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KenB wrote:
"John John" <audetweld@xxxxxxxxxxx> wrote in message
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KenB wrote:
Here's one for you:
What if you applied the patch, and see the correct time (and note that
it says "Eastern Daylight Time" on the date/time applet) and then
reboot?
I find the time displayed is 1hr off (backwards, so it's supposed to
be 1:30, but displays 12:30).
So I go back into the Date/Time applet, and find that it says "Eastern
Standard Time". Then I hit the Time Zone tab and change to another
timezone, and back immediately to Eastern. I make sure the Daylight
checkbox is checked. Hit Apply, and the time display correctly again,
until the next reboot.
_After_ you do the above and enter the correct time open a command
prompt and issue:
w32tm /resync /rediscover
What happens?
John
Just rebooted (had the correct time displayed as a result of doing the
time zone re-application I wrote about. It shows the time as 10:44 (an
hour earlier than it should be). If I issue the command you said, w32tm
/resync /rediscover , it says "Sending resync command to local
computer... The command completed seuccessfully." Yet, the time
displayed is still an hour back.
If I do:
c:\w32tm /tz, I get:
Time zone: Current:TIME_ZONE_ID_STANDARD Bias: 300min
(UTC=LocalTime+Bias)
[Standard Name:"Eastern Standard Time" Bias:0min Date:(M:10 D:5
DoW:0)]
[Daylight Name:"Eastern Daylight Time" Bias:-60min Date:(M:4 D:1
DoW:0)]
(this almost looks like the rule is set for month 4, day 1 (so April
1--the old rule)
If I do:
c:\w32tm /monitor, I get:
trcdc01.trc.CW.LOCAL [120.0.0.151]:
ICMP: 0ms delay.
NTP: +0.0192818s offset from trcdc02.trc.CW.LOCAL
RefID: trcdc02.trc.CW.LOCAL [120.0.0.158]
trcdc02.trc.CW.LOCAL *** PDC *** [120.0.0.158]:
ICMP: 0ms delay.
NTP: +0.0000000s offset from trcdc02.trc.CW.LOCAL
RefID: shlroot01.cw.local [10.7.226.125]
Opening tzedit shows the correct rules (Daylight Saving Time Start
date/time Second Sunday of March at 2a, end at First Sunday November at
2a).
Let me know if this helps you out... or if there's anythign else I
should be looking at.
I'm going to have to think about this and do some searching. I was
thinking that the computers might be synchronizing to different servers,
that could have explained why some machines were off and others not.
In the meantime use tzedit again and look at the ""Eastern Daylight Time"
Daylight Bias: It should be +1:00 hours. The information posted above
seems to show it as being set at -1:00 hours (Bias:-60min).
John
Odd... If I manually do the re-application of time zone, and display the
correct time, TZEdit shows the right rule (+1:00), but wm32tm /tz
shows -60... there's a discrepancy /somewhere/
I appreciate your efforts in finding the solution on this... it's
baffling to me!
That isn't the problem. The Bias are shown "reversed" with w32tm. Using
tzedit shows GMT offset as -5:00 hours and Daylight offset as +1:00 hours;
w32tm shows it the other way around: 300min for GMT offset and -60min for
DST Bias. More or less comes to the same thing, just that the tools
display it differently.
These machines do not appear to be properly patched. W32tm should return:
[Standard Name:?Eastern Standard Time? Bias:0min Date:(M:11 D:1 DoW:0)]
[Daylight Name:?Eastern Daylight Time? Bias:-60min Date:(M:3 D:2 DoW:0)]
Compare these keys on a faulty machine:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time
Zones\Eastern Standard Time]
"Display"="(GMT-05:00) Eastern Time (US & Canada)"
"Dlt"="Eastern Daylight Time"
"Std"="Eastern Standard Time"
"MapID"="38,39"
"Index"=dword:00000023
"TZI"=hex:2c,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,00,00,01,00,02,00,00,\
00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time
Zones\Eastern Standard Time\Dynamic DST]
"FirstEntry"=dword:000007d6
"LastEntry"=dword:000007d7
"2006"=hex:2c,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,02,00,\
00,00,00,00,00,00,00,00,04,00,00,00,01,00,02,00,00,00,00,00,00,00
"2007"=hex:2c,01,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,00,00,01,00,02,00,\
00,00,00,00,00,00,00,00,03,00,00,00,02,00,02,00,00,00,00,00,00,00
These are the proper Eastern Standard Time values for a properly patched
machine. From a known good machine you can export the complete key and
subkeys at:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones
and import it into the registry of a faulty machine. Then reapply the
time zone settings via the Date/Time applet and see if things correct
themselves.
John
Checked my machine in a state where it's displaying an hour behind (says
3:19p when it should be 4:19p) All the reg keys matched up to what you
posted... weird! What's scarier--what's to happen 4/1, when DST was
supposed to happen? --but that's for another posting ;0
Thanks
Ken
.
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