The transition to daylight saving time may cause problems with Windows, Microsoft says

Microsoft has issued a notice to Windows 7 and later client and server users in Chile. The software titan warns that the approaching Daylight Saving Time (DST) time zone transition may cause problems and glitches in numerous aspects of the operating systems for users. Windows users in Chile need not worry; this is not the Y2K bug.

The Chilean government declared on August 9, 2022, that the country's official time would advance by 60 minutes on September 10, rather than September 4. For this reason, the following symptoms may appear on Windows-based computers:

• Time shown in Windows and apps will not be correct.
• Apps and cloud services which use date and time for integral functions, such as Microsoft Teams and Microsoft Outlook, notifications and scheduling of meetings might be 60 minutes off.
• Automation using date and time, such as Scheduled tasks, might not run at the expected time.
• Timestamp on transactions, files, and logs will be 60 minutes off.
• Operations that rely on time-dependent protocols such as Kerberos might cause authentication failures when attempting to logon or access resources.
• Windows devices and apps outside of Chile might also be affected if they are connecting to servers or devices in Chile or if they are scheduling or attending meetings taking place in Chile from another location or time zone. Windows devices outside of Chile should not use the workaround, as it would change their local time on the device.

Here is what Chilean clients may do to prevent glitches and other issues brought on by the DST transition:

You can mitigate this issue on devices in Chile by doing either of the following on September 4, 2022 and undoing on September 11, 2022:

• ​Select the Windows logo key, type “Date and time”, and select Date and time settings. From the Date & time settings page, toggle Adjust for daylight saving time automatically to Off.
• ​Go to Control Panel > Clock and Region > Date and Time > Change time zone and uncheck the option for “Automatically adjust clock for Daylight Saving Time”.

To mitigate this issue in the Santiago time zone, after 12:00 a.m. on September 11, 2022, and for those in the Easter Islands time zone, after 10:00 p.m. on September 10, 2022, follow the steps below to re-enable automatic DST adjustments and ensure accurate time switching with future DST transitions. This can be done by doing either of the following:

• ​Select the Windows logo key, type “Date and time”, and select Date and time settings. From the Date & time settings page, toggle Adjust for daylight saving time automatically to On.
• ​Go to Control Panel > Clock and Region > Date and Time > Change time zone and check the option for “Automatically adjust clock for Daylight Saving Time”.

Microsoft advises users in countries other than Chile not to adjust their Daylight Saving Time because of a workaround described in the official documentation. In order to accommodate the time change in Chile, the company aims to produce an update, but it will require additional time for development, testing, and distribution. Due to Microsoft's failure to implement the modification in time, users will have to make the necessary adjustments to their systems on their own.