'new Date()' gets a wrong timezone from headless chrome in linux docker image

I have a docker image with linux, and there is a headless chrome service. When I use "new Date()" in my html, it get a time "Sat Dec 29 2018 02:45:24 GMT-0600 (Central Standard Time)", it's wrong. The docker time is 'Sat, 29 Dec 2018 17:24:27 +0800', it's right.

And my time zone is 'CST' (China standard Time), as similar as 'CST'(Central Standard Time). Dose that matter?...

enter image description here

Solution

Sure, containers are created in UTC timezone by default. How to make it correspond to your host's OS - depends on the type of guest OS. For Debian I simply set

Dockerfile

....
ENV TZ=Europe/Moscow   # or whatever is you one
....