Switch timezone on linux systems. Very helpful when running tests on a CI and verifying that timezone logic works properly.

linux-switch-timezone.sh

# Switch the timezone on a linux system
#
# I use this to run unit tests on the CI for multiple times with different timezones (at least 2)
# Tested on a node alpine docker container on GitLab CI
# Timezone values: "UTC", "Europe/Berlin", ...

# Fetch timezone data
- apk add tzdata

# Log out number of timeszones (debug)
- ls -1 /usr/share/zoneinfo/ | wc -l

# Copy desired timezone to system
- cp /usr/share/zoneinfo/UTC /etc/localtime

# Set desired timezone
- echo "UTC" > /etc/timezone

# Log current date in defined timezone (debug)
- date