How do I change timezone in a docker container

Question

I'm running a docker container from docker-hub for my development stack; the image was created for a different timezone than where my application is supposed to be deployed.

In a Docker container, how do I change the timezone?

I attempted to modify the timezone configuration within the container by running

echo "Africa/Lusaka" > /etc/timezone

I restarted the container, but the timezone remains the same.