Hi,

The correct time is already set in the Guacamole container, as shown in the 
screenshot below.

[cid:[email protected]]

I have mounted my VM’s timezone volumes into the container, and it is correctly 
set to Europe/Paris.

[cid:[email protected]]

However, when I check my logs and use the guac_time variable, the time is still 
shown in UTC.

Best Regards,


De : Nick Couchman <[email protected]>
Envoyé : jeudi 28 août 2025 17:35
À : [email protected]
Objet : Re: Change TimeZone ${GUAC_TIME}

On Thu, Aug 28, 2025 at 6:22 AM Yohann Feasson 
<[email protected]<mailto:[email protected]>> wrote:
Hi,

I’m running Guacamole in Docker and need to change the timezone of the 
${GUAC_TIME} variable, which is currently in UTC.

I’ve tried updating the time in all three containers (Guacamole, PostgreSQL, 
Guacd) and also changed the timezone inside PostgreSQL, but nothing has worked 
so far.

I haven’t been able to find any guidance online.


The guidance is here:

https://guacamole.apache.org/doc/gug/configuring-guacamole.html#parameter-tokens

Could you tell me where this variable gets its time from?

This should be coming from the time zone of the guacamole container. After you 
change the local time zone of the container you will likely need to restart the 
container or the Tomcat process in the container, as I suspect the change is 
only re-read at startup.

-Nick

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