Hello There! I have created a simple Lightning Web Component Open Source App to display a mutltiple timezone clocks. Here is the live version of my app : https://rahulgawale.github.io/multiple-timezone-clock-lwc-oss/
Start simple by running yarn watch (or npm run watch, if you set up the project with npm). This will start the project with a local development server.
The source files are located in the src folder. All web components are within the src/modules folder. The folder hierarchy also represents the naming structure of the web components.
Find more information on the main repo on GitHub.