Docker - Timezones in containers not same as on host

Question

In all my running docker containers the containers system time is set to UTC whereas on my host (debian) its CEST.

Why dont they sync automaticly? How do i make them set the right time when bringing them up?

root@v2201510680628925:/home/jacob# docker version Client: Version: 1.11.2 API version: 1.23 Go version: go1.5.4 Git commit: b9f10c9 Built: Wed Jun 1 21:36:47 2016 OS/Arch: linux/amd64 Server: Version: 1.11.2 API version: 1.23 Go version: go1.5.4 Git commit: b9f10c9 Built: Wed Jun 1 21:36:47 2016 OS/Arch: linux/amd64 root@v2201510680628925:/home/jacob# date Wed Aug 2 09:59:20 CEST 2017 root@v2201510680628925:/home/jacob# docker exec -it naos_nginx bash root@0cefa7f7096c:/# date Wed Aug 2 07:59:34 UTC 2017 root@0cefa7f7096c:/# exit exit root@v2201510680628925:/home/jacob# docker exec -it ah_avail bash root@da52e8f3f61f:/usr/src/app# date Wed Aug 2 07:59:59 UTC 2017 root@da52e8f3f61f:/usr/src/app# exit exit root@v2201510680628925:/home/jacob# 

Answer 1

You should be able to set timezone in your containers by using tzdata :

docker run -e TZ=Europe/Amsterdam debian:jessie date 

Credits and further explanation to "Why containers don't sync time with host" : Docker Container time & timezone (will not reflect changes)