This project contains the schematics and PCB layout for a 24-hour digital quartz clock with self-dimming LED display.
Full write-up is at https://medium.com/@erikvanzijst/a-digital-quartz-clock-from-scratch-a80ec5e427
The project uses the DigiKey Kicad symbol and footprint libraries. After cloning or downloading those locally, add them to the Kicad Symbol and Footprint libraries.