what make system time changes?

[Guest ykffc]

OS: Windows 2000 server

 

When we had Daylight saving time effective weeks ago, the system time of

this machine failed to adjust automatically (although I have the checkbox on

to adjust automatically). I can understand this as Microsoft no longer

supports this old version of OS and they no longer produce updates/patches

for this.

 

For software compatibility and other reasons we haven't upgraded this

machine. However, I don't think it should be the end of the world. It is a

matter of seconds to adjust the time by hand.

 

Two days ago I started to adjust the system time from say 13:15 to 14:15

(2:15 pm). But after a while, say after 30 minutes, it was discovered that

the system time changed itself back to 13:45. It looks like something in the

background is changing the time automatedly. I tried a few times in two days

but all failed the same way. Why is that?

 

I have tried to set & unset the "automatic adjust DST" checkbox, reboot the

system more than once. Nothing helps. BTW, the machine is part of a domain

but I doubt if that matters. I have't heard of a policy that could affect the

time !?

 

I heard about software that sounds like "atomic clock synchronization" which

might make a machine to automatedly set its time in line with something. But

this is obviously not what we shall do with this machine. Can someone tell

me what are the other functions that might change the system time of a

machine in the background?

 

thanks.

[Guest John John (MVP)]

Re: what make system time changes?

 

Of course it matters if the machine is part of a domain. Is the time

properly set on the domain controller?

 

Basic Operation of the Windows Time Service

http://support.microsoft.com/kb/224799/

 

John

 

ykffc wrote:

> OS: Windows 2000 server

>

> When we had Daylight saving time effective weeks ago, the system time of

> this machine failed to adjust automatically (although I have the checkbox on

> to adjust automatically). I can understand this as Microsoft no longer

> supports this old version of OS and they no longer produce updates/patches

> for this.

>

> For software compatibility and other reasons we haven't upgraded this

> machine. However, I don't think it should be the end of the world. It is a

> matter of seconds to adjust the time by hand.

>

> Two days ago I started to adjust the system time from say 13:15 to 14:15

> (2:15 pm). But after a while, say after 30 minutes, it was discovered that

> the system time changed itself back to 13:45. It looks like something in the

> background is changing the time automatedly. I tried a few times in two days

> but all failed the same way. Why is that?

>

> I have tried to set & unset the "automatic adjust DST" checkbox, reboot the

> system more than once. Nothing helps. BTW, the machine is part of a domain

> but I doubt if that matters. I have't heard of a policy that could affect the

> time !?

>

> I heard about software that sounds like "atomic clock synchronization" which

> might make a machine to automatedly set its time in line with something. But

> this is obviously not what we shall do with this machine. Can someone tell

> me what are the other functions that might change the system time of a

> machine in the background?

>

> thanks.

[Guest ykffc]

Re: what make system time changes?

 

Thank you John.

 

Before I found the Primary DC was not set correctly but the secondary was

(all DC runs Win2003 server). Time were both correctly set already but still

exactly the same problem. I need to read your recommended KB.

 

 

"John John (MVP)" wrote:

> Of course it matters if the machine is part of a domain. Is the time

> properly set on the domain controller?

>

> Basic Operation of the Windows Time Service

> http://support.microsoft.com/kb/224799/

>

> John

>

> ykffc wrote:

>

> > OS: Windows 2000 server

> >

> > When we had Daylight saving time effective weeks ago, the system time of

> > this machine failed to adjust automatically (although I have the checkbox on

> > to adjust automatically). I can understand this as Microsoft no longer

> > supports this old version of OS and they no longer produce updates/patches

> > for this.

> >

> > For software compatibility and other reasons we haven't upgraded this

> > machine. However, I don't think it should be the end of the world. It is a

> > matter of seconds to adjust the time by hand.

> >

> > Two days ago I started to adjust the system time from say 13:15 to 14:15

> > (2:15 pm). But after a while, say after 30 minutes, it was discovered that

> > the system time changed itself back to 13:45. It looks like something in the

> > background is changing the time automatedly. I tried a few times in two days

> > but all failed the same way. Why is that?

> >

> > I have tried to set & unset the "automatic adjust DST" checkbox, reboot the

> > system more than once. Nothing helps. BTW, the machine is part of a domain

> > but I doubt if that matters. I have't heard of a policy that could affect the

> > time !?

> >

> > I heard about software that sounds like "atomic clock synchronization" which

> > might make a machine to automatedly set its time in line with something. But

> > this is obviously not what we shall do with this machine. Can someone tell

> > me what are the other functions that might change the system time of a

> > machine in the background?

> >

> > thanks.

>

>

[Guest John John (MVP)]

Re: what make system time changes?

 

You're welcome. Another thing that might be affecting this is if

incorrect changes were made when applying DST fixes for the new(er)

dates. Someone might have done this manually with tzedit and they may

have gotten the dates wrong or they may have changed the GMT bias... or

the machine might simply be set in the wrong time zone.

 

John

 

ykffc wrote:

> Thank you John.

>

> Before I found the Primary DC was not set correctly but the secondary was

> (all DC runs Win2003 server). Time were both correctly set already but still

> exactly the same problem. I need to read your recommended KB.

>

>

> "John John (MVP)" wrote:

>

>

>>Of course it matters if the machine is part of a domain. Is the time

>>properly set on the domain controller?

>>

>>Basic Operation of the Windows Time Service

>>http://support.microsoft.com/kb/224799/

>>

>>John

>>

>>ykffc wrote:

>>

>>

>>>OS: Windows 2000 server

>>>

>>>When we had Daylight saving time effective weeks ago, the system time of

>>>this machine failed to adjust automatically (although I have the checkbox on

>>>to adjust automatically). I can understand this as Microsoft no longer

>>>supports this old version of OS and they no longer produce updates/patches

>>>for this.

>>>

>>>For software compatibility and other reasons we haven't upgraded this

>>>machine. However, I don't think it should be the end of the world. It is a

>>>matter of seconds to adjust the time by hand.

>>>

>>>Two days ago I started to adjust the system time from say 13:15 to 14:15

>>>(2:15 pm). But after a while, say after 30 minutes, it was discovered that

>>>the system time changed itself back to 13:45. It looks like something in the

>>>background is changing the time automatedly. I tried a few times in two days

>>>but all failed the same way. Why is that?

>>>

>>>I have tried to set & unset the "automatic adjust DST" checkbox, reboot the

>>>system more than once. Nothing helps. BTW, the machine is part of a domain

>>>but I doubt if that matters. I have't heard of a policy that could affect the

>>>time !?

>>>

>>>I heard about software that sounds like "atomic clock synchronization" which

>>>might make a machine to automatedly set its time in line with something. But

>>>this is obviously not what we shall do with this machine. Can someone tell

>>>me what are the other functions that might change the system time of a

>>>machine in the background?

>>>

>>>thanks.

>>

>>

[Guest TestTurtle]

Re: what make system time changes?

 

Try this utility...it also can auto set:

http://tf.nist.gov/service/its.htm

and this:

http://www.grystmill.com/articles/tz_update.htm

 

Please read the pages/docs first and you'll be fine.