May 2016 DST update for Azerbaijan, Chile, Haiti, and Morocco in Windows

This article describes an update of daylight saving time (DST) settings for Azerbaijan, Chile, Haiti, and Morocco in 2016. Before you install this update, see the Prerequisites section.

This update applies to the following operating systems:

  • Windows Server 2012 R2
  • Windows 8.1
  • Windows RT 8.1
  • Windows Server 2012
  • Windows Embedded 8
  • Windows Server 2008 R2 Service Pack 1 (SP1)
  • Windows 7 SP1
  • Windows Server 2008 Service Pack 2 (SP2)
  • Windows Vista SP2
  • Windows XP Embedded
Note To get these updates for Windows 10, install the latest cumulative updates listed in the Windows 10 update history page.
Changes made in this update

Azerbaijan

The scheduled switch to DST on Sunday, March 27, 2016, in Azerbaijan is canceled. Azerbaijan will, instead, stay on UTC+4 all year.

Time zone key nameDisplay nameDST endDST start
Azerbaijan Standard Time(UTC+04:00) BakuNot applicableNot applicable

Chile

Chile will return to standard time this year. Clocks will be set back by an hour at midnight on Sunday, May 15, and be set ahead an hour at midnight on Sunday, August 14.

Time zone key nameDisplay nameDST endDST start
Easter Island Standard Time(UTC-06:00) Easter IslandMay 14, 2016 at 22:00August 13, 2016 at 22:00
Pacific SA Standard Time(UTC-04:00) SantiagoMay 15, 2016 at 00:00August 14, 2016 at 00:00

Haiti

Haiti will not observe DST in 2016. The planned time change on Sunday, March 13, 2016, is canceled.

Time zone key nameDisplay nameDST endDST start
Haiti Standard Time(UTC-05:00) HaitiNot applicableNot applicable

Morocco

The DST period for Morocco is suspended during the Muslim month of Ramadan (03:00 on Sunday, June 5, 2016, to 02:00 on Sunday, July 10, 2016, in the Gregorian calendar).

Time zone key nameDisplay nameDST startDST end
Morocco Standard Time(UTC) CasablancaMarch 27, 2016 at 02:00June 5, 2016 at 03:00

Note
Easter Island and Haiti are new time zones.
More information
This known issue affects only those users who select one of the two Chilean time zones. After installing this update, these users will see an incorrect message in the Date and Time settings dialog box that resembles one of the following:

  • Users who select (UTC-04:00) Santiago will see the following message:

    Daylight Savings Time ends on Sunday, April 27, 2014 at 12:00 AM. The clock is set to go back 1 hour at that time.
  • Users who select (UTC-06:00) Easter Island will see the following message:

    Daylight Savings Time ends on Saturday, April 26, 2014 at 10:00 PM. The clock is set to go back 1 hour at that time.
Despite these messages, clocks in Chile will be set to the correct time that is shown in the tables in the "Changes made in this update" section after this update is installed. The text in the Date and Time settings dialog box will be automatically corrected after the transition.
Who should install this update?
We recommend that you install DST updates on all computers, including both desktops and servers, for all users worldwide regardless of where the computers are physically located. The need for time zone information cannot always be anticipated, or its usage may not be obvious to the user. 

While it's important to keep time correctly on a computer’s local clock, consider also that many users interact regularly with users in other time zones through international phone calls and online meetings. Additionally, many Microsoft and third-party applications and services let users select their own time zone. Therefore, the servers that host those applications must have accurate time zone information.

Many other business scenarios also require accurate time zone information. These include coordinating travel itineraries, calculating hourly wages, and automating lighting and machinery. 

How to get this update

Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is provided as an Important update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The following files are available for download from the Microsoft Download Center.

Operating systemUpdate
All supported x86-based versions of Windows 8.1DownloadDownload the package now.
All supported x64-based versions of Windows 8.1 DownloadDownload the package now.
All supported x64-based versions of Windows Server 2012 R2DownloadDownload the package now.
All supported x64-based versions of Windows Server 2012DownloadDownload the package now.
All supported x86-based versions of Windows 7DownloadDownload the package now.
All supported x64-based versions of Windows 7DownloadDownload the package now.
All supported x64-based versions of Windows Server 2008 R2DownloadDownload the package now.
All supported IA-64-based versions of Windows Server 2008 R2DownloadDownload the package now.
All supported x86-based versions of Windows VistaDownloadDownload the package now.
All supported x64-based versions of Windows VistaDownloadDownload the package now.
All supported x86-based versions of Windows Server 2008DownloadDownload the package now.
All supported x64-based versions of Windows Server 2008DownloadDownload the package now.
All supported IA-64-based versions of Windows Server 2008DownloadDownload the package now.
Note The update for Windows RT 8.1 can be downloaded only from Windows Update.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Update detail information

Prerequisites

To apply this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2.Or, install Service Pack 1 for Windows 7 or Windows Server 2008 R2. Or, install Service Pack 2 for Windows Vista and for Windows Server 2008.

Registry information

To apply this update, you don't have to make any changes to the registry.

Restart requirement

You don't have to restart the computer after you apply this update.

Update replacement information

This update doesn't replace a previously released update.
References
Learn about the terminology that Microsoft uses to describe software updates.
File information
For a list of the files that are provided in this update, download the file information for update 3153731.
Properties

Article ID: 3153731 - Last Review: 06/08/2016 04:13:00 - Revision: 6.0

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 8.1, Windows RT 8.1, Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows Embedded 8 Standard, Windows Server 2008 R2 Service Pack 1, Windows 7 Service Pack 1, Windows Server 2008 Service Pack 2, Windows Vista Service Pack 2, Windows XP Embedded Service Pack 3

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