Chrome Version       : Chromium 67.0.3396.87
OS Version           : Debian 9.4 armhf on SolidRun Hummingboard 2
URLs (if applicable) : any
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari:
    Firefox:
    IE/Edge:

What steps will reproduce the problem?
1. Set system timezone to Australia/Melbourne while in daylight savings time (such as the date of reporting).
1. Use puppeteer to run chromium.
2. Load any URL which clearly displays the time, such as https://codepen.io/anon/pen/gBxYaV or http://www.clocktab.com/.

What is the expected result?

The time is correct, and the date string should show "GMT+1100 (Australian Eastern Daylight Time)" for the time zone.

What happens instead of that?

The time is an hour off, and the date string shows "GMT+1000 (GMT+10:00)".

Please provide any additional information below. Attach a screenshot if
possible.

I haven't tested whether it works outside of puppeteer, but this is on a headless box so it's a bit tricky to try.

It works correctly in Chromium on Arch Linux on my laptop.

This was originally reported at https://github.com/GoogleChrome/puppeteer/issues/3264 where someone also saw this on Debian 8.