Summary

This update supersedes and replaces update 2633952, which was released in December 2011. All additional time zone changes released as hotfixes after update 2633952 are incorporated in this update.

If you have already deployed update 2633952, read the descriptions of the specific time zone changes that are addressed in this article to determine whether you must deploy this update immediately. If systems are not directly affected, you can schedule deployment at the next available opportunity.

We recommend that you deploy the most current Windows cumulative time zone update to guarantee the consistency of the time zone database on all systems.

Important

  • Before you apply the update that is described in this article, be aware of potential issues that may affect Microsoft Outlook. For more information about these issues, view the article in the Microsoft Knowledge Base:

    931667 How to address time zone changes by using the Time Zone Data Update Tool for Microsoft Office Outlook

  • If you are running Microsoft Exchange Server in an Information Technology (IT) environment, you must take additional measures to guarantee the correct operation of Exchange Server. For more information about the Exchange daylight saving time (DST) update, view the article in the Microsoft Knowledge Base:

    941018 How to address daylight saving time by using the Exchange Calendar Update Tool

  • Cumulative time zone updates contain only data that has changed for a specific region or that was added to maintain parity with other operating system versions. Therefore, if a time zone key is deleted, some original values may not be restored after you apply the cumulative zone update.

    We do not recommend that you delete any registry keys that are related to time zones. On a computer that has incomplete time zone keys, first restore the time zone keys from a known good backup. Then, apply the update.

More Information

The update that this article describes changes the time zone data to accommodate daylight saving time (DST) changes in several countries.

The update that this article describes is a cumulative update rollup that includes all previous Windows time zone changes. For more information about how DST changes may affect other Microsoft products, visit the following Microsoft website: 

http://support.microsoft.com/gp/cp_dst

For more information about how daylight saving time changes may affect other Microsoft products, click the following article number to view the article in the Microsoft Knowledge Base:

914387 How to configure daylight saving time for Microsoft Windows operating systems

Please note: These packages are affected by the issue that is described in Microsoft Security Advisory 2749655. In this issue, the digital signature on files that are produced and signed by Microsoft expire prematurely, and are therefore no longer available. The latest packages for these DST transitions are now available for download in the following Microsoft Knowledge Base article:

2756822 October 2012 cumulative time zone update for Windows operating systems

The following changes were made since the previous Windows cumulative time zone update:

  • E. Europe Standard Time:
    The display name for this time zone has been updated to "(UTC+2:00) E. Europe." from "(UTC+2:00) Nicosia."

  • Azores Standard Time:
    Changes the 2013 DST start time to occur at 12:00:00 AM on the last Sunday of March and end time to occur at 01:00:00 AM on the last Sunday of October.

  • Caucasus/ Armenian Standard Time:
    As previously described in the following blog (http://blogs.technet.com/b/dst2007/archive/2012/03/22/armenia-cancels-dst.aspx) the government of Armenia has cancelled Daylight Saving Time and will stay on permanent “winter time”. That article suggested that users move to a "workaround time" of Russian Standard Time. This Windows update makes the move permanent by removing the DST rule for the time zone “(UTC+4:00) Yerevan”

  • Pacific SA Standard Time:
    As previously announced in Microsoft Knowledge Base article 2681116, Chile has extended the 2012 Daylight Saving Time. The Chilean government has changed the 2012 DST start date to occur on the first Saturday of September 23:59:59.999 and end date to occur on the last Saturday of April at 23:59:59.999.

  • Morocco Standard Time:
    As previously announced in Microsoft Knowledge Base article 2698707, Morocco will switch to daylight saving time from 2012 onwards. The Moroccan government has changed the 2012 DST start date to occur on the last Sunday of April and end date to occur on the last Sunday of September. During the time of Ramadan, DST will be interrupted and from July 20 to August 19, 2012, time will be turned back to standard time. The transitions reflecting the start and end of Ramadan are not included in this KB, and can be installed by using the Fix-It solutions provided in Microsoft Knowledge Base article 2698707.

  • Samoa History Correction:
    Samoa Time zone changes were included in Microsoft Knowledge Base article 2633952 (December 2011 Cumulative time zone update). As a result of this update, the entire 2011 calendar was updated to (UTC+13). This update reverts the 2011 calendar to (UTC-11) while the 2012 and future calendars will continue to be (UTC+13). The history correction has also been contained in KB 2657025.

  • Russian History Correction:
    Russian Time zone changes were included in Knowledge Base article 2570791 (August 2011 Cumulative time zone update). As a result of Russia canceling DST and staying on permanent "summer time," the entire 2011 calendar was updated to summer time. This update changes the 2011 calendar to show winter time before March 27, 2011 while DST was still in effect. The history correction has also been contained in KB 2657025.

The time zone changes are summarized in the following table.

Time zone key name

Display name

New DST start

New DST end

Additional Comments

E. Europe Standard Time

(UTC+02:00) E. Europe

Not applicable

Not applicable

The DST rules did not change, only the display name changed from Nicosia to E.Europe

Azores Standard Time

(UTC-01:00) Azores

Last Sunday of March 00:00:00.000

Last Sunday of October 01:00:00.000 

This rule would be applicable from 2013 onwards only. 2012 rule remains unchanged.

Caucasus/ Armenian Standard Time

(UTC+04:00) Yerevan

No DST



No DST

DST has been turned off for this time zone.

Pacific SA Standard Time

(UTC-04:00) Santiago

First Saturday of September
23:59:59.999

Last Saturday of April



23:59:59.999

Morocco Standard Time

(UTC) Casablanca

Last Sunday of April

02:00:00.000

Last Sunday of September



03:00:00.000

Ramadan transitions are undertaken by the Fix-It solutions that are provided in 2698707.



The following is a complete list of additional display name changes that are implemented in these packages for specific locales.

Time zone

Applicable Locale

Old Display Name

Updated Display Name

Applicable Platforms

Central America

Spanish

Hora de verano de Centroamérica

Hora de verano, América Central

Vista, Win 7

Central America

Spanish

Hora estándar de Centroamérica

Hora estándar, América Central

Vista, Win 7

Chennai, Kolkata, Mumbai, New Delhi

Bulgarian

(UTC+05:30) Ченай, Калкута, Мумбай, Ню Делхи

(UTC+05:30) Ченай, Колката, Мумбай, Ню Делхи

Vista, Win 7

Chennai, Kolkata, Mumbai, New Delhi

Czech

(UTC+05:30) Bombaj, Čennaj, Kalkata, Nové Dillí

(UTC+05:30) Mumbaí (Bombay), Čennaj, Kolkata (Kalkata), Nové Dillí

Vista, Win 7

Yangon (Rangoon)

Czech

(UTC+06:30) Rangún

(UTC+06:30) Yangon (Rangún)

Vista, Win 7

Samoa Daylight Time



Samoa Standard Time

Czech

Ostrovy Samoa (letní čas)

Ostrovy Samoa (běžný čas)

Samoa (letní čas)



Samoa (běžný čas)

Vista, Win 7

Magadan, Solomon Is., New Caledonia

Dutch

(UTC+11:00) Magadan, Solomon Is., Nieuw-Caledonië;

(UTC+11:00) Magadan, Salomonseilanden, Nieuw-Caledonië

Vista, Win 7

Solomon Is., New Caledonia

Dutch

(UTC+11:00) Solomon Is., Nieuw-Caledonië

(UTC+11:00) Salomonseilanden, Nieuw-Caledonië

Vista, Win 7

Solomon Is., New Caledonia

Dutch

(GMT+11:00) Solomon Is., Nieuw-Caledonië

(GMT+11:00) Salomonseilanden, Nieuw-Caledonië

Win2K, Win 2003, XP

Chennai, Kolkata, Mumbai, New Delhi

Finnish

(UTC+05:30) Chennai, Kalkutta, Mumbai, New Delhi

(UTC+05:30) Chennai, Kolkata (Kalkutta), Mumbai, New Delhi

Vista, Win 7

Almaty, Novosibirsk

Finnish

(UTC+06:00) Alma-Ata, Novosibirsk

(UTC+06:00) Astana, Novosibirsk

Vista, Win 7

Beijing, Chongqing, Hong Kong, Urumqi

Finnish

(UTC+08:00) Peking, Chongqing, Hongkong, Urumqi

(UTC+08:00) Beijing, Chongqing, Hongkong, Urumqi

Vista, Win 7

Magadan, Solomon Is., New Caledonia

French

(UTC+11:00) Magadan, Îles Salomon, Nouvelle Calédonie

(UTC+11:00) Magadan, Îles Salomon, Nouvelle-Calédonie

Vista, Win 7

Solomon Is., New Caledonia

French

(UTC+11:00) Îles Salomon, Nouvelle Calédonie

(UTC+11:00) Îles Salomon, Nouvelle-Calédonie

Vista, Win 7

Beijing, Chongqing, Hong Kong, Urumqi

German

(UTC+08:00) Peking, Chongqing, Hongkong, Urumchi

(UTC+08:00) Peking, Chongqing, Hongkong (SAR), Urumchi

Vista, Win 7

Central Europe Standard Time

German

(GMT+01:00) Belgrado, Bratislava, Budapest, Liubliana, Praga

(GMT+01:00) Belgrad, Bratislava (Pressburg), Budapest, Ljubljana, Prag

Vista, Win7

Chennai, Kolkata, Mumbai, New Delhi

Greek

(UTC+05:30) Μαντράς, Καλκούτα, Βομβάη, Νέο Δελχί

(UTC+05:30) Τσενάι, Κολκάτα, Μουμπάι, Νέο Δελχί

Vista, Win 7

Almaty, Novosibirsk

Greek

(UTC+06:00) Αλμά-Ατά, Νοβοσιμπίρσκ

(UTC+06:00) Αστάνα, Νοβοσιμπίρσκ

Vista, Win 7

Almaty, Novosibirsk

Latvian

(UTC+06:00) Alma-Ata, Novosibirska

(UTC+06:00) Almati, Novosibirska

Vista, Win 7

Samoa Daylight Time

Lithuanian

Samoa vasaros /

žiemos laik

Samoa vasaros /

žiemos laikas

Vista, Win 7

Samoa Standard Time

Lithuanian

Standartinis Samoa

laik

Standartinis Samoa

laikas

Vista, Win 7

Magadan, Solomon Is., New Caledonia

Lithuanian

(UTC+11:00)

Magadanas,

Saliamono salos,

Naujoji Kaledonija

(UTC+11:00)

Magadanas,

Saliamono Salos,

Naujoji Kaledonija

Vista, Win 7

Solomon Is., New Caledonia

Lithuanian

(UTC+11:00)

Saliamono salos,

Naujoji Kaledonija

(UTC+11:00)

Saliamono Salos,

Naujoji Kaledonija

Vista, Win 7

Azores

Norwegian

(UTC-01:00) Azorene

Azorene (sommertid)

Azorene (normaltid)

(UTC-01:00) Asorene

Asorene (sommertid)

Asorene (normaltid)

Vista, Win 7

Beijing, Chongqing, Hong Kong, Urumqi

Norwegian

(UTC+08:00) Peking, Chongqing, Hongkong, Ürümqi

(UTC+08:00) Beijing, Chongqing, Hongkong, Ürümqi

Vista, Win 7

Yangon (Rangoon)

Polish

(UTC+06:30) Rangun

(UTC+06:30) Yangon (Rangun)

Vista, Win 7

Chennai, Kolkata, Mumbai, New Delhi

Portuguese (Portugal)

(UTC+05:30) Chennai, Calcutá, Mumbai, Nova Deli

(UTC+05:30) Chennai, Kolkata (Calcutá), Mumbai, Nova Deli

Vista, Win 7

Fiji

Turkish

Fiji Yaz Saati

Fiji Standart Saati

(UTC+12:00) Fiji, Marshall Adl.

(UTC+12:00) Fiji

Fiji Adaları Yaz Saati

Fiji Adaları Standart Saati

(UTC+12:00) Fiji Adaları, Marshall Adl.

(UTC+12:00) Fiji Adaları

Vista, Win 7

Midway Island, Samoa

Ukrainian

(UTC-11:00) о. Мідуей, Американське Самоа

Східна Центральна Європа (літо)

(UTC-11:00) о. Мідуей, Самоа

Східна Європа (літо)

Vista, Win 7

E. Europe

Ukrainian

Східна Центральна Європа (зима)

Східна Європа (зима)

Vista, Win 7

Yangon (Rangoon)

Ukrainian

(UTC+06:30) Янґон (Рангун)

(UTC+06:30) Янґон

Vista, Win 7

Kaliningrad, Minsk

Ukrainian

(UTC+06:00) Алмати, Новосибірськ

(UTC+06:00) Астана, Новосибірськ

Vista, Win 7

Registry Key Information

E.Europe

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\E. Europe Standard Time]

"MUI_Display"="@tzres.dll,-1680"

"MUI_Dlt"="@tzres.dll,-331"

"MUI_Std"="@tzres.dll,-332"

"Display"="(UTC+02:00) E. Europe"

"TZI"=hex:88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,03,00,00,\

00,00,00,00,00,00,00,03,00,00,00,05,00,02,00,00,00,00,00,00,00

Azores

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Azores Standard Time]

"TZI"=hex:3c,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,03,00,00,\

00,00,00,00,00,00,00,03,00,00,00,05,00,02,00,00,00,00,00,00,00



[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Azores Standard Time\Dynamic DST]

"FirstEntry"=dword:000007dc

"LastEntry"=dword:000007dd

"2012"=hex:3c,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,03,00,\

00,00,00,00,00,00,00,00,03,00,00,00,05,00,02,00,00,00,00,00,00,00

"2013"=hex:3c,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,01,00,\

00,00,00,00,00,00,00,00,03,00,00,00,05,00,00,00,00,00,00,00,00,00



Armenia (Win 7 and Vista)

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Caucasus Standard Time]

"TZI"=hex:10,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,\

00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00



[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Caucasus Standard Time\Dynamic DST]

"FirstEntry"=dword:000007db

"LastEntry"=dword:000007dc

"2011"=hex:10,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,03,00,\

00,00,00,00,00,00,00,00,03,00,00,00,05,00,02,00,00,00,00,00,00,00

"2012"=hex:10,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,\

00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00




Armenia (Win XP and Win 2k3 and Win 2k)

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Armenian Standard Time]

"TZI"=hex:10,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,\

00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00



[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Armenian Standard Time\Dynamic DST]

"FirstEntry"=dword:000007db

"LastEntry"=dword:000007dc

"2011"=hex:10,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,03,00,\

00,00,00,00,00,00,00,00,03,00,00,00,05,00,02,00,00,00,00,00,00,00

"2012"=hex:10,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,\

00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00



Morocco

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Morocco Standard Time]

"TZI"=hex:00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,09,00,00,00,05,00,03,00,00,\

00,00,00,00,00,00,00,04,00,00,00,05,00,02,00,00,00,00,00,00,00



[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Morocco Standard Time\Dynamic DST]

"FirstEntry"=dword:000007d7

"LastEntry"=dword:000007dc

"2007"=hex:00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,\

00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00

"2008"=hex:00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,08,00,00,00,05,00,17,00,\

3b,00,3b,00,e7,03,00,00,05,00,06,00,05,00,17,00,3b,00,3b,00,e7,03

"2009"=hex:00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,08,00,04,00,03,00,17,00,\

3b,00,3b,00,e7,03,00,00,05,00,00,00,05,00,17,00,3b,00,3b,00,e7,03

"2010"=hex:00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,08,00,06,00,01,00,17,00,\

3b,00,3b,00,e7,03,00,00,05,00,06,00,01,00,17,00,3b,00,3b,00,e7,03

"2011"=hex:00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,07,00,06,00,05,00,17,00,\

3b,00,3b,00,e7,03,00,00,04,00,06,00,01,00,17,00,3b,00,3b,00,e7,03

"2012"=hex:00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,09,00,00,00,05,00,03,00,\

00,00,00,00,00,00,00,00,04,00,00,00,05,00,02,00,00,00,00,00,00,00





Chile

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Pacific SA Standard Time]

"TZI"=hex:f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,05,00,17,00,3b,\

00,3b,00,e7,03,00,00,09,00,06,00,01,00,17,00,3b,00,3b,00,e7,03


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Pacific SA Standard Time\Dynamic DST]

"FirstEntry"=dword:000007d7

"LastEntry"=dword:000007dd

"2007"=hex:f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,02,00,17,00,\

3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03

"2008"=hex:f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,05,00,17,00,\

3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03

"2009"=hex:f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,02,00,17,00,\

3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03

"2010"=hex:f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,01,00,17,00,\

3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03

"2011"=hex:f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,05,00,06,00,01,00,17,00,\

3b,00,3b,00,e7,03,00,00,08,00,06,00,03,00,17,00,3b,00,3b,00,e7,03

"2012"=hex:f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,05,00,17,00,\

3b,00,3b,00,e7,03,00,00,09,00,06,00,01,00,17,00,3b,00,3b,00,e7,03

"2013"=hex:f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,02,00,17,00,\

3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03

Windows XP

Prerequisites

You must have Windows XP Service Pack 3 (SP3) installed to apply this update. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack


Update replacement information

Note You can install this cumulative update rollup even after you have installed any of the following previously released updates. This update replaces the following update:

2633952 December 2011 cumulative time zone update for Microsoft Windows operating systems

Windows Server 2003

Prerequisites

You must have Windows Server 2003 SP2 installed to apply this update. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Update replacement information

Note You can install this cumulative update rollup even after you have installed any of the following previously released updates. This update replaces the following update:

2633952 December 2011 cumulative time zone update for Microsoft Windows operating systems 

Windows Vista or Windows Server 2008

Prerequisites

You must have Windows Vista or Windows Server 2008 Service Pack 2 installed to apply this update.

Update replacement information

Note You can install this cumulative update rollup even after you have installed any of the following previously released updates. This update replaces the following update:

2633952 December 2011 cumulative time zone update for Microsoft Windows operating systems

Windows 7 or Windows Server 2008 R2

Prerequisites

No prerequisites are required to apply this update. The same package installs both on the RTM version as well as the SP1 versions of Windows 7 and Windows Server 2008 R2.Update replacement informationNote: You can install this cumulative update rollup even after you have installed any of the following previously released updates. This update replaces the following update:

2633952 December 2011 cumulative time zone update for Microsoft Windows operating systems 


Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×