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The September 2020 Cumulative Update Preview for Windows 10 includes the following correction to the Daylight Savings Time (DST) end date for Fiji:


  • DST will end in Fiji on January 17, 2021. Due to defined rules in Windows, however, this date is noted in Windows as January 10, 2021, which is incorrect. Installing the September 2020 Cumulative Update Preview (or later) for Windows 10 will fix this issue and ensure that end user devices experience the correct DST transition on January 17th.
  • This correction is for devices running the following versions of Windows 10:
    • Windows 10, version 1809
    • Windows 10, version 1903
    • Windows 10, version 1909
    • Windows 10, version 2004
  • Devices running other supported versions of Windows will see the relevant changes in the October monthly quality update.

For Microsoft’s official policy on DST and time zone changes, please see Daylight saving time help and support. For information on how to update Windows to use the latest global time zone rules, see How to configure daylight saving time for Microsoft Windows operating systems.