Time and Language Turn On or Off Adjust for Daylight Saving Time Automatically in Windows 11

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Time_Zone_banner.png

Daylight saving time (DST) is the practice of advancing clocks (typically by one hour) during warmer months so that darkness falls at a later clock time. The typical implementation of DST is to set clocks forward by one hour in the spring ("spring forward") and set clocks back by one hour in autumn ("fall back") to return to standard time. As a result, there is one 23-hour day in late winter or early spring and one 25-hour day in the autumn.

Daylight saving time implementation varies from country to country. Some countries may not observe daylight saving time (DST), whereas other countries may change the start dates and end dates for daylight saving time every year. This article describes how to update Windows to use the latest DST and global time zone rules.

Many applications and cloud services reference the underlying Windows operating system for daylight saving time (DST) and time zone (TZ) information.

See also:

Windows 11 will automatically adjust the time for daylight saving time by default, but you can turn this setting on or off anytime you want.

This tutorial will show you how to turn on or off automatically adjust clock for daylight saving time (DST) for all users in Windows 11.


Contents

  • Option One: Turn On or Off Adjust for Daylight Saving Time Automatically in Settings
  • Option Two: Turn On or Off Adjust for Daylight Saving Time Automatically in Control Panel
  • Option Three: Turn On or Off Adjust for Daylight Saving Time Automatically using REG file





OPTION ONE

Turn On or Off Adjust for Daylight Saving Time Automatically in Settings


You must be signed in as an administrator to use this option.


1 Open Settings (Win+I).

2 Click/tap on Time & language on the left side, and click/tap on Date & time on the right side. (see screenshot below)

Daylight_saving_time_Settings-1.png

3 Turn On (default) or Off Adjust for daylight saving time automatically on the right side for what you want. (see screenshot below)

The Adjust for daylight saving time automatically setting will be grayed out if Set time zone automatically is turned on.


Daylight_saving_time_Settings-2.png

4 You can now close Settings if you like.





OPTION TWO

Turn On or Off Adjust for Daylight Saving Time Automatically in Control Panel


1 Open the Control Panel (icons view), and click/tap on the Date and Time icon.

2 You can close the Control Panel if you like.

3 In the Date and Time tab, click/tap on the Change time zone button. (see screenshot below)

Daylight_saving_time_Control_Panel-1.png

4 Check (default) or uncheck Automatically adjust clock for Daylight Saving Time for what you want, and click/tap on OK. (see screenshot below)

Daylight_saving_time_Control_Panel-2.png

5 Click/tap on OK. (see screenshot below)

Daylight_saving_time_Control_Panel-3.png





OPTION THREE

Turn On or Off Adjust for Daylight Saving Time Automatically using REG file


You must be signed in as an administrator to use this option.


1 Do step 2 (on) or step 3 (off) below for what you would like to do.


2 To Turn On Adjust for Daylight Saving Time Automatically

This is the default setting.


A) Click/tap on the Download button below to download the file below, and go to step 4 below.​

Turn_ON_adjust_for_daylight_saving_time_automatically.reg


(Contents of REG file for reference)
Code:
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation]
"ActiveTimeBias"=dword:0000012c
"Bias"=dword:00000168
"DaylightBias"=dword:ffffffc4
"DaylightStart"=hex:00,00,03,00,02,00,02,00,00,00,00,00,00,00,00,00
"DynamicDaylightTimeDisabled"=dword:00000000
"StandardStart"=hex:00,00,0b,00,01,00,02,00,00,00,00,00,00,00,00,00

3 To Turn Off Adjust for Daylight Saving Time Automatically

A) Click/tap on the Download button below to download the file below, and go to step 4 below.​

Turn_OFF_adjust_for_daylight_saving_time_automatically.reg


(Contents of REG file for reference)
Code:
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation]
"ActiveTimeBias"=dword:00000168
"Bias"=dword:00000168
"DaylightBias"=dword:00000000
"DaylightStart"=hex:00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"DynamicDaylightTimeDisabled"=dword:00000001
"StandardStart"=hex:00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00

4 Save the .reg file to your desktop.

5 Double click/tap on the downloaded .reg file to merge it.

6 When prompted, click/tap on Run, Yes (UAC), Yes, and OK to approve the merge.

7 Either sync clock time or restart computer to apply.

8 You can now delete the downloaded .reg file if you like.


That's it,
Shawn Brink


 

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