Microsoft warns of bugs after nation pushes back DST switch • The Register

Last month’s decision by Chilean leaders to delay the switch to daylight saving time (DST) by a week could cause headaches for some Windows users if they don’t implement Microsoft’s proposed solution.

On August 9, the Chilean government announced that it would advance the start of daylight saving time, from September 4 to September 11, by a week on the basis that citizens would vote on a new constitution on the fourth. For the record, nearly 62 percent of voters came out against the new progressive constitution, ending two years of drafting and promoting it.

For Windows 7 to 11 users, the time change next Sunday might be a problem. Windows devices may report incorrect times in the operating system and applications, scheduled tasks may not run when expected, and timestamps on transactions, files, and logs will be off by one hour.

In its alert For users, Microsoft also said that apps and cloud services like Teams and Outlook that use date and time for key functions can also crash within 60 minutes. Operations that rely on time-dependent protocols could also experience authentication failures when trying to log in to devices or access resources.

And the problems may extend beyond Chile’s borders.

“Windows devices and applications outside of Chile could also be affected if they connect to servers or devices in Chile or if they are scheduling or attending meetings taking place in Chile from another location or time zone,” Microsoft said, adding that “Windows devices outside of Chile should not use the workaround, as it would change your local time on the device.”

The software giant said engineers are working on an update to resolve the issue in the next version, but they weren’t sure there would be enough time to build, test and release an update before the time change takes effect. Given that, he urged users to use the solution instead.

According to Microsoft insiders, there are two sets of steps users can take after 9/4 and then undo on 9/11. The first is to select the Windows logo key, type “date and time” and select “date and time settings”. From the date and time settings page, they should turn off “adjust for daylight saving time automatically”.

Alternatively, they can go to Control Panel > Clock and Region > Date and Time > Change Time Zone and uncheck the option to automatically adjust closing for daylight saving time.

Microsoft also established steps for users in the Santiago and Easter Island time zones.

The client operating systems affected by the daylight saving time change are: Windows 11, version 21H2; Windows 10, version 21H2; Windows 10, version 21H1; Windows 10, version 20H2; Windows 10 Enterprise LTSC 2019; Windows 10 Enterprise LTSC 2016; Windows 10 Enterprise 2015 LTSB; Windows 8.1; and Windows 7 SP1.

For servers, the affected platforms are: Windows Server 2022; Windows Server 2019; Windows Server 2016; Windows Server 2012 R2; Windows Server 2012; Windows Server 2008 R2 SP1; and Windows Server 2008 SP2.

Chile has not made it easy for Microsoft over the years. Since 1987 the country has changed the time changes more than a dozen times for various reasons; from a visit by Pope John Paul II that year, a drought in 1999 and an earthquake in 2010, to hydrological conditions and a decision in 2015 to keep daylight saving time year-round. That decision was reversed a year later.

That said, Chile is not the only country that makes its time changes. The United States is already challenging given Arizona and Hawaii’s decision not to recognize daylight saving time and the growing push in some states to ditch biannual time changes altogether and make daylight saving time year-round. The US also extended daylight saving time in 1986 and 2007. ®

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