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Microsoft Daylight Saving Time & Time Zone Blog

This is the blog maintained by staff at Microsoft to provide general information, announcements and provide answers to Frequently Asked Questions (FAQs) related to daylight saving time (DST) and time zone (TZ) changes around the world.* Important Notice

Upcoming Windows DST Update for Chile and Mexico

Microsoft is preparing update to address recent time zone data changes in Chile and Mexico. Details...

Author: Win DST Date: 02/06/2015

Update for Fiji DST change 2014 is available now

Pleas download the hotfix package from here: support.microsoft.com/kb/3011843

Author: Win DST Date: 10/30/2014

Fiji DST Change for 2014

Fiji government announced on Oct. 20th, 2014 that Fiji will enter DST on November 2nd, 2014 till Jan...

Author: Win DST Date: 10/23/2014

Update for Russian Time Zone Changes is Now Available

Please visit support.microsoft.com/kb/2998527 for the update details.

Author: Win DST Date: 09/23/2014

Announcement: Update for Russian Time Zone Changes

According to a recent law [link] passed by the government of Russia, Russia will change its existing...

Author: Win DST Date: 08/22/2014

August 2014 DST Cumulative Update for Windows Operating Systems

The August 2014 DST Cumulative Update for Windows Operating Systems has been published on Microsoft...

Author: Win DST Date: 08/12/2014

Updates Available for Egypt DST Ramadan Exception in 2014

The government of Egypt has decided to pause DST during the holy month of Ramadan in 2014, from...

Author: Win DST Date: 07/24/2014

Updates Available for Morocco DST Ramadan Exception in 2014

The government of Morocco has decided to pause DST during the holy month of Ramadan in 2014, from...

Author: Win DST Date: 07/24/2014

Updates available for Paraguay, Turkey and Chile time zones

This time zone update for Windows Operating Systems has been published on Microsoft Download Center....

Author: Win DST Date: 03/17/2014

December 2013 DST Cumulative Update for Windows Operating Systems

The December 2013 DST Cumulative Update for Windows Operating Systems has been published on...

Author: Win DST Date: 12/09/2013

August 2013 DST Cumulative Update for Windows operating systems

The August 2013 DST Cumulative Update for Windows Operating Systems has been published on Microsoft...

Author: Win DST Date: 08/13/2013

HOTFIX: Paraguay Shortens 2012-13 DST

The government of Paraguay has Shortened Daylight Saving Time for 2012-13 [Official Decree]. DST for...

Author: Win DST Date: 03/20/2013

HOTFIX: Chile Extends 2013 DST

The government of Chile has extended Daylight Saving Time for 2013 [Official Decree]. DST for...

Author: Win DST Date: 03/06/2013

NOTICE: Hotfix available for Israel and Libya time zone

This hotfix contains three new changes in Windows Daylight Saving Time support: The government of...

Author: Win DST Date: 02/04/2013

December 2012 DST Cumulative Update for Windows operating systems

The December2012 DST Cumulative update for Windows operating systems has been published on Microsoft...

Author: Win DST Date: 11/27/2012

October 2012 DST Cumulative Update for Windows operating systems

The October 2012 DST Cumulative update for Windows operating systems has been published on Microsoft...

Author: Win DST Date: 10/11/2012

Notice: Ramadan Exception for Morocco DST

As stated in the previous blog post, Microsoft has issued updates for Morocco introducing Daylight...

Author: Win DST Date: 06/20/2012

2012 DST changes for Morocco

According to a recent law [link] passed by the government of Morocco, Morocco will follow DST each...

Author: Win DST Date: 04/16/2012

Hotfix available for Chile DST change

The government of Chile has extended Daylight Saving Time for 2012 [Official Decree]. DST for...

Author: Win DST Date: 03/07/2012

December 2011 DST Cumulative Update for Windows operating systems

The December 2011 DST Cumulative update for Windows operating systems has been published on...

Author: Win DST Date: 11/23/2011

Notice: Ukraine and Armenia revert 2011 DST cancellation

The previous post calls out planned 2011 DST cancellations for Belarus, Ukraine and Armenia [link]....

Author: Win DST Date: 10/19/2011

Announcement: Upcoming Microsoft webcast on daylight saving time changes in Russia

Update: The recorded webcast is now available on-demand here. Understanding and preparing for the...

Author: Win DST Date: 09/13/2011

Notice: A hotfix is available to update Windows DST support for Egypt, Chile and Morocco

This hotfix contains three new changes in Windows Daylight Saving Time support : The government of...

Author: Win DST Date: 05/03/2011

Notice : DST schedule updated again for Chile

Notice : The government of Chile recently decided to extend 2011 Daylight Saving Time again. This...

Author: Win DST Date: 03/31/2011

Notice: a hotfix is available to update Windows DST support for (UTC -4:00) Santiago

The government of Chile revised their 2011 Daylight Saving Time schedule to defer the ending of DST...

Author: Win DST Date: 03/25/2011

Notice : A hotfix is available to update Windows DST support for (UTC +12:00) Fiji, and (UTC -11:00) Samoa

The government of Fiji revised their 2011 Daylight Saving Time schedule so that it ends the first...

Author: Win DST Date: 03/25/2011

December 2010 DST Cumulative Update for Windows operating systems

The December 2010 DST Cumulative Update for Windows operating systems focuses on the following...

Author: Win DST Date: 12/02/2010

September 2010 Daylight Saving Time (DST) Cumulative Update

The September Cumulative Update (CU) for DST contains three changes : For US Eastern Standard time...

Author: Win DST Date: 10/06/2010

Notice: A hotfix is available to update the Daylight Saving Time for the “(UTC) Casablanca” time zone for Windows Operating Systems

Morocco will observe daylight saving time in 2010. Microsoft has produced a hotfix to implement this...

Author: atsim1 Date: 04/20/2010

A hotfix is available to update the Daylight Saving Time for Paraguay, Fiji and Chile time zones - KB 981128

A Windows hotfix has been released to support the following DST changes: · Set DST start date for...

Author: atsim1 Date: 03/10/2010

Notice: Microsoft Windows Daylight Saving Time and Time Zone update now available (February 2010)

The most recent cumulative update to daylight saving time (DST) and world time zones (TZ) is now...

Author: atsim1 Date: 02/23/2010

Hotfix Available for Bangladesh 2009/2010 Daylight Saving Time

12/28/2009 Update: As announced today, Bangladesh has decided to end DST on December 31, 2009. This...

Author: atsim1 Date: 12/11/2009

Hotfix Available for Fiji 2009/2010 Daylight Saving Time

Fiji government has approved the re-introduction of daylight saving time in Fiji, from Sunday,...

Author: atsim1 Date: 11/30/2009

Microsoft Windows Daylight Saving Time and Time Zone update now available (December 2009)

The most recent cumulative update to daylight saving time (DST) and world time zones (TZ) is now...

Author: atsim1 Date: 11/24/2009

Microsoft Announces Update to Support Policy for Daylight-Saving Time or Time Zone Changes

As part of Microsoft’s continued focus on customer satisfaction, we are announcing a revision to the...

Author: atsim1 Date: 09/03/2009

Microsoft Windows Daylight Saving Time and Time Zone update now available (August 2009)

The most recent cumulative update to daylight saving time (DST) and world time zones (TZ) is now...

Author: atsim1 Date: 08/26/2009

Notice: Optional Fix-it Available for Bangladesh 2009 Daylight Saving Time

As reported in the Bangladesh Government’s Gazette, Bangladesh has announced the introduction of...

Author: atsim1 Date: 06/12/2009

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