The config is a JSON object with a single property "clocks".

Each clock is an object with a "name" and "timezone" property.

The "name" is the name of the clock and the "timezone" is the timezone of the clock.

You can use the placeholder {{timezone}} in the name to display the timezone name.

The "timezone" can be "unix", "local", "utc", or a valid timezone string.

The "unix" zone is special as it just shows a unix timestamp.

The "local" timezone is the local timezone and "utc" is the UTC timezone.

Otherwise the "timezone" can be a valid timezone string like "America/New_York" or "Europe/Paris".