Hellow,
Currently, my server's timezone is UTC (Debian Bullseye).
<quote>
soyeomul@yw-1204:~$ timedatectl
Local time: Fri 2026-02-13 02:03:57 UTC
Universal time: Fri 2026-02-13 02:03:57 UTC
RTC time: n/a
Time zone: Etc/UTC (UTC, +0000)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
soyeomul@yw-1204:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 11 (bullseye)
Release: 11
Codename: bullseye
soyeomul@yw-1204:~$ hostname --fqdn
yw-1204.doraji.xyz
soyeomul@yw-1204:~$
</quote>
<quote: from Gmail Inbox>
Received: from yw-1204.doraji.xyz (yw-1204.doraji.xyz. [2a03:ebc0:5000:12::10])
by mx.google.com with ESMTPS id ffacd0b85a97d-43796a60b98si1372478f8f.41.2026.02.12.16.42.29
for <soyeomul+gcp@gmail.com>
(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);
Thu, 12 Feb 2026 16:42:29 -0800 (PST)
</quote>
As above sample, mx.google.com use PST as timezone.
Will it be okay if i change the time zone to PST?


--- PyGate Linux v1.5.11
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

Hi,

On Fri, Feb 13, 2026 at 11:09:45AM +0900, Byunghee HWANG (???) wrote:

<quote: from Gmail Inbox>
Received: from yw-1204.doraji.xyz (yw-1204.doraji.xyz. [2a03:ebc0:5000:12::10])
by mx.google.com with ESMTPS id ffacd0b85a97d-43796a60b98si1372478f8f.41.2026.02.12.16.42.29
for <soyeomul+gcp@gmail.com>
(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);
Thu, 12 Feb 2026 16:42:29 -0800 (PST)
</quote>

As above sample, mx.google.com use PST as timezone.
Will it be okay if i change the time zone to PST?

This header is added by Google's infrastructure as the mail comes in to
them. No matter what time zone you use on your computers, those headers
wuill continue to say PST. It doesn't matter what you do, so [continue
to] use a time zone that makes sense for you.

Thanks,
Andy

PS multiple Google employees have told me informally that the decision
to use PST time zone on their servers is regarded as a mistake by
many there. It's common to advocate for UTC on servers, for many
reasons such as; having end users all over the world who see logs and
headers in a time zone like PST which they may be less familiar with
than UTC; picking a time zone that does daylight savings adjustments
twice a year is unnecessarily confusing; and so on. On desktops,
especially single user machines, it is more firmly a personal choice.

--
https://bitfolk.com/ -- No-nonsense VPS hosting

--- PyGate Linux v1.5.11
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

David Wright <deblis@lionunicorn.co.uk> writes:

On Fri 13 Feb 2026 at 11:09:45 (+0900), Byunghee HWANG (???) wrote:

Currently, my server's timezone is UTC (Debian Bullseye).

<quote>
soyeomul@yw-1204:~$ timedatectl
Local time: Fri 2026-02-13 02:03:57 UTC
Universal time: Fri 2026-02-13 02:03:57 UTC

[ ? ]

</quote>

<quote: from Gmail Inbox>
Received: from yw-1204.doraji.xyz (yw-1204.doraji.xyz. [2a03:ebc0:5000:12::10])
by mx.google.com with ESMTPS id ffacd0b85a97d-43796a60b98si1372478f8f.41.2026.02.12.16.42.29
for <soyeomul+gcp@gmail.com>
(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);
Thu, 12 Feb 2026 16:42:29 -0800 (PST)
</quote>

As above sample, mx.google.com use PST as timezone.
Will it be okay if i change the time zone to PST?

Yes, you can choose any time zone you like. But I'm surprised
that you'd want it set to -0800 PST just because some google
mail exchange server uses it, particularly as you appear to
reside in the +0900 KST time zone, 17 hours ahead in winter
and 16 in the summer (assuming mx.google.com switches to
-0700 PDT in just over three weeks time).

One minor point: I think you may find that the logs don't mark
their time zone as clearly with bullseye as they do with bookworm
and trixie.

Hellow David!
Thanks for your kind replying. Yes, i real place is South Korea
(+0900). I love my homeland, Korea.
My fianl Inbox is Google Gmail. So i was thinking about timezone it for
a bit. This (doraji.xyz) is a forwarding-only mail server, thanks!

Sincerely, Byunghee


--- PyGate Linux v1.5.11
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

Hellow Andy,
Andy Smith <andy@strugglers.net> writes:

Hi,

On Fri, Feb 13, 2026 at 11:09:45AM +0900, Byunghee HWANG (???) wrote:

<quote: from Gmail Inbox>
Received: from yw-1204.doraji.xyz (yw-1204.doraji.xyz. [2a03:ebc0:5000:12::10])
by mx.google.com with ESMTPS id ffacd0b85a97d-43796a60b98si1372478f8f.41.2026.02.12.16.42.29
for <soyeomul+gcp@gmail.com>
(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);
Thu, 12 Feb 2026 16:42:29 -0800 (PST)
</quote>

As above sample, mx.google.com use PST as timezone.
Will it be okay if i change the time zone to PST?

This header is added by Google's infrastructure as the mail comes in to
them. No matter what time zone you use on your computers, those headers
wuill continue to say PST. It doesn't matter what you do, so [continue
to] use a time zone that makes sense for you.

Thanks,
Andy

PS multiple Google employees have told me informally that the decision
to use PST time zone on their servers is regarded as a mistake by
many there. It's common to advocate for UTC on servers, for many
reasons such as; having end users all over the world who see logs and
headers in a time zone like PST which they may be less familiar with
than UTC; picking a time zone that does daylight savings adjustments
twice a year is unnecessarily confusing; and so on. On desktops,
especially single user machines, it is more firmly a personal choice.

Oh very cool information... Maybe i'll have to stick with UTC timezone
for a while, thanks a lot for your reply.

Sincerely, Byunghee


--- PyGate Linux v1.5.11
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

Hellow Marco,
Marco Moock <mm@dorfdsl.de> writes:

On 13.02.2026 03:20 Byunghee HWANG (???) wrote:

<quote: from Gmail Inbox>
Received: from yw-1204.doraji.xyz (yw-1204.doraji.xyz.
[2a03:ebc0:5000:12::10]) by mx.google.com with ESMTPS id
ffacd0b85a97d-43796a60b98si1372478f8f.41.2026.02.12.16.42.29 for
<soyeomul+gcp@gmail.com> (version=TLS1_3
cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Feb 2026
16:42:29 -0800 (PST) </quote>

As above sample, mx.google.com use PST as timezone.
Will it be okay if i change the time zone to PST?

This is just a timestamp, very application that parses the Received:
lines must be able to parse the correct timezones, so you can change
your local timezone too. I operate mail servers with Europe/Berlin
(UTC+1 and DST).

yw-1204 is located in Frankfurt, Germany. I just personally like
Frankfurt, so i made yw-1204 in Germany. The mail server is very robust
and performing its job well. It's automatically forwarding hundreds of
Debian BTS messages to Google (my Gmail Inbox). Yes, i once thought
about the Berlin time zone too. Thanks for your kind comments ^^^

Sincerely, Byunghee


--- PyGate Linux v1.5.11
* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)