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Telling Windows to use UTC?

slajoh01
slajoh01 asked
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Last Modified: 2008-02-01
I am dual-booting Windows 2000/Solaris operating systems and my INTERNAL CLOCK is set to UTC...by doing this in Windows:
HKLM/SYSTEM/CurrentControlSet/Control/TimeZoneInformation/RealTimeIsUniversal
(REG_DWORD = 1)

Also telling Solaris to do the same with a command..

The ACTUAL DISPLAYED clocks on both desktops are set to local time (PDT)...

But per the instructions, after telling Windows to use UTC by creating that new registry key,  then after that, it says to go in the Date/Time settings in the Control Panel and CHECK the box "ADJUST TO DST AUTOMATICALLY".....

If UTC time is CONSTANT or does not adjust during DST....then why does the instructions say to check that box???

Heres the instructions for Windows below:
=========================================
Here is a non temporary fix to this problem (from Casper Dick's blog):

- tell Windows to use UTC:

Set the following registry key (it does not exist!)

HKLM/SYSTEM/CurrentControlSet/Control/TimeZoneInformation/RealTimeIsUniversal (REG_DWORD = 1)

In the control panel with Day&Time settings, check the "automatically adjust" check box.
===========================================


Thanks
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Author

Commented:
The reason I did that...because this area seems to be more less active in discussions..

Im sorry
jkr
CERTIFIED EXPERT
Top Expert 2012

Commented:
No reason to be sorry, but which Q do you want to keep? Both?

Author

Commented:
This one....Since Im running 2000 anyway... I have to EDIT this question here...
==============================================
Ok,

I am running a dual-boot system running Windows 2000/Solaris...I have already set the INTERNAL CLOCK to UTC... and on both OSs, it has LOCAL TIMES displayed (PDT)..on the desktop clocks currently...

I am thinking about using the time (not the INTERNAL clock) on Solaris and keeping LOCAL TIME under Windows...If I do this, do I need to have the "Adjust to DST time Automatically" under Windows in the  Date/Time settings? Or, should I leave it unchecked if I decide to do this..?

My question is....will this cause any time conflicts on both OSs DURING Daylight Savings Time??? Will it cause any conflicts??



Author

Commented:
I just want to prevent the same problems that I had with the clocks being different from each other during DST and I want to prevent the same thing from happening again if I decide to keep Solaris on UTC and leaving Windows on LOCAL TIME while keeping the INTERNAL CLOCK as UTC. Thats all.

Author

Commented:
EDIT>>>>>

Ok,

I am running a dual-boot system running Windows 2000/Solaris...I have already set the INTERNAL CLOCK to UTC... and on both OSs, it has LOCAL TIMES displayed (PDT)..on the desktop clocks currently...

I am thinking about using the time (not the INTERNAL clock) on Solaris UTC and keeping LOCAL TIME under Windows...If I do this, do I need to have the "Adjust to DST time Automatically" under Windows in the  Date/Time settings? Or, should I leave it unchecked if I decide to do this..?

My question is....will this cause any time conflicts on both OSs DURING Daylight Savings Time??? Will it cause any conflicts??

Author

Commented:
I am suprised that the experts here does not know this??? Thats very suprising...

Please...this is very important...

Author

Commented:
Am I in the right forum or something? I am getting the silent treatment or what?

OK, heres an easier question...

How can I tell in WIndows that the CMOS clock is set to UTC time?

Author

Commented:
HELLO??????

WHY AM I GETTING THE SILENT TREATMENT HERE...You dont that either???

At least have the GUTS to admit YOU DONT KNOW....

At least I'll know where to turn and continue on another forum.
Commented:
I do not think BIOS clock has any knowledge of what time zone it is in.
See this:
http://blogs.msdn.com/oldnewthing/archive/2004/09/02/224672.aspx

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