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