How to switch to winter time in Windows XP?

Question

Time Zones

Microsoft has officially announced that it will not be releasing updates for the transition to winter time for Windows XP.
How can I pre-program the transition to winter time (namely, changing the registry settings) so that until October 26, 2014 the time zone is UTC + 4, and after 02.00 am - UTC + 3?
You can’t do it by simply editing the registry, because updates used to do this somehow in advance.
Dynamic DST is also not suitable, since it is only supported starting with Vista.
I am interested in a recipe for 1000+ Windows XP computers in a domain network in cases where computers can be turned off on the night of 10/26/2014 so that they work at UTC + 4 before turning off in the evening of 10/25/2014, and after turning on in the morning of 10/26/2014 they work in UTC+3.
(Upgrading to Windows 7 and above is not an option.)

Answer 1

You can try by editing HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation
Set DaylightBias = -240 (4*60)
Register a one-time transition to daylight saving time in DaylightStart until
10/26/2014 Register a single transition in StandardStart at 3:00 10/26/2014
Wait for everyone switched to summer
Change Bias to -180
Go to 10/26/2014
Optionally clean the registry from your modifications
This is the TIME_ZONE_INFORMATION structure, description here msdn.microsoft.com/en-us/library/windows/desktop/m...
As Microsoft writes, if in StandardStart and DaylightStart, the wYear field is equal to 0 - this is an annual transition, if not equal - a one-time transition.
Some more informationwindowsitpro.com/windows-server/jsi-tip-0398-how-s...
And there is a nuance - for the transition StandardStart and DaylightStart both must be filled, if at least one is empty - there will be no transition.
PS: it can be simpler:
ActiveTimeBias is the current offset, respectively:
ActiveTimeBias = -240
DaylightBias = -240
Bias = -180
DaylightStart = any date time before the current
StandardStart = 3:00 10/26/2014
Waiting for the transition We
clean up after ourselves (I don’t like to leave)

Answer 2

Another option is quite simple to remove the old update 2570791, it seems like itfound.ru/114-windowsxp-zimnee-vremya-perehod.html

Answer 3

For Windows XP, I wrote a registry file to create all new time zones in Russia since the fall of 2014 new-time-russia-2014.reg