[bug]: In user profile page, GMT offsets for US timezones are one hour off

[patbarron]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

In the user profile page in a self-hosted instance, when selecting a user's timezone, all US timezones are one hour off from what they currently should be. See example below.

Note that US/Eastern time is listed as GMT-04:00. Currently, it is actually GMT-05:00. All US timezones are similarly incorrect. The displayed GMT offsets would be valid if Daylight Savings Time were currently in effect - but it is not.

The actual behavior of the system is correct - for example, when I log in and go to the workspace homepage, the time displayed is actually the correct local time, as selected by my current timezone. It is just the GMT offsets displayed in the profile page, in the timezone selection dialog, that are incorrect.

Steps to reproduce

1. Log into a Plane instance.
2. Click on the user avatar in the left-side navigation panel, and select "Settings"
3. Click on the drop-down arrow for the "Timezone" field.
4. Note that GMT offsets for all offered US timezones are off by one hour.

Environment

Production

Browser

Google Chrome

Variant

Self-hosted

Version

v0.24.1

[patbarron]

If it matters, my Plane instance is deployed on Arch Linux, updated as of earlier today. (As Arch Linux is a "rolling release" distro, there is no release version number, per se - but the installed kernel, after applying all available updates to my system earlier today, is 6.12.8-arch1-1.)