Windows VM Timezone doesn't match host

[visch]

System details

Framework 16, Omarchy 3.3.3

What's wrong?

Windows VM Doesn't match host, and trying to force NTP to sync, changing the Timezone in the Windows VM, and doing a bunch of other debugging steps didn't do it for me.

Ultimately what worked for me was tweaking the docker-compose in windows/docker-compose.yml and adding an environment var of TZ: "American/New_York"

I'm sure there's a better way that would work for everyone

[pomartel]

Can you share what you added in docker-compose.yml? I have the same issue and could turn it in a PR.

[visch]

Yes, no problem

services:
  windows:
    image: dockurr/windows
    container_name: omarchy-windows
    environment:
      # Container timezone - must match host for QEMU RTC to work correctly
      # Without this, container runs in UTC and Windows shows wrong time
      TZ: "America/New_York"
      # Better RTC sync - use host clock with drift correction
      # Fixes Windows NTP "failed to update time server" by keeping VM clock synced to host
      # Without this, QEMU only sets -rtc base=localtime which can drift
      ARGUMENTS: "-rtc base=localtime,clock=host,driftfix=slew"
      VERSION: "11"
      RAM_SIZE: "16G"
      CPU_CORES: "6"
      DISK_SIZE: "64G"
      USERNAME: "visch"
      PASSWORD: "redacted"
    devices:
      - /dev/kvm
      - /dev/net/tun
    cap_add:
      - NET_ADMIN
    ports:
      - 8006:8006
      - 3389:3389/tcp
      - 3389:3389/udp
    volumes:
      - /home/visch/.windows:/storage
      - /home/visch/Windows:/shared
    restart: always
    stop_grace_period: 2m

[daviewales]

Could it be related to the fact that Windows expects the hardware time to be local time, while linux expects it to be UTC?

There are some instructions here to encourage Windows to use UTC instead:
https://help.ubuntu.com/community/UbuntuTime#Multiple_Boot_Systems_Time_Conflicts

[visch]

I would imagine this is it, easiest thing to do is make a change in the windows OS here it seems

[pomartel]

Thanks! I submitted a PR: #4489

[visch]

wow glad that worked for you! I'm not super confident those timezones and the ARGUMENTS: "-rtc base=localtime,clock=host,driftfix=slew" is correct, but if it works it works I guess