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Q&A How can I get Windows 10 to stop displaying the wrong time on bootup?

What's happening The operating systems are using the hardware clock in different ways. Linux uses UTC while widows uses localtime (dubious I know). So when you boot the other OS, it's gonna see th...

posted 2mo ago by Iizuki‭  ·  edited 2mo ago by Iizuki‭

Answer
#2: Post edited by user avatar Iizuki‭ · 2024-10-09T06:30:46Z (about 2 months ago)
Fix link
  • # What's happening
  • The operating systems are using the hardware clock in different ways. Linux uses UTC while widows uses localtime (dubious I know). So when you boot the other OS, it's gonna see that the hardware clock is bonkers and update it. Evidently Linux manages to this behind the scenes while windows doesn't.
  • # The fix
  • Configure windows to use UTC too by setting this registry value to `1`:
  • ```registry
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\RealTimeIsUniversal
  • ```
  • More info in [ArchWiki](https://wiki.archlinux.org/title/.System_time#UTC_in_Microsoft_Windows)
  • # What's happening
  • The operating systems are using the hardware clock in different ways. Linux uses UTC while widows uses localtime (dubious I know). So when you boot the other OS, it's gonna see that the hardware clock is bonkers and update it. Evidently Linux manages to this behind the scenes while windows doesn't.
  • # The fix
  • Configure windows to use UTC too by setting this registry value to `1`:
  • ```registry
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\RealTimeIsUniversal
  • ```
  • More info in [ArchWiki](https://wiki.archlinux.org/title/System_time#UTC_in_Microsoft_Windows)
#1: Initial revision by user avatar Iizuki‭ · 2024-10-08T06:27:43Z (about 2 months ago)
# What's happening

The operating systems are using the hardware clock in different ways. Linux uses UTC while widows uses localtime (dubious I know). So when you boot the other OS, it's gonna see that the hardware clock is bonkers and update it. Evidently Linux manages to this behind the scenes while windows doesn't.

# The fix

Configure windows to use UTC too by setting this registry value to `1`:

```registry
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\RealTimeIsUniversal
```

More info in [ArchWiki](https://wiki.archlinux.org/title/.System_time#UTC_in_Microsoft_Windows)