I was helping a co-worker fixing a TimeZoneNotFoundException error. The error was actually on TimeZoneInfo.FindSystemTimeZoneById(). Per my experience, it was based on timezone installed in the machine. I was told that using Windows or Linux Id both throw an exception.

I found out that the application Docker base image is based on Alpine Linux. A quick search reveals that Alpine Linux doesn't have tzdata package installed.

Added the following line in the Dockerfile fixed the error.

RUN apk add --no-cache tzdata