Project sprint done in one single day:

https://hackaday.io/project/173507-epaper-digital-magnets-clock
The mission is to make an epaper digital clock with the lowest power consumption in ESP32

repository:

https://github.com/martinberlin/cale-idf/wiki/Demo-epaper-clock

Even the most impresice clock is right at least once a day!

If you are interested in making your own ESP32 digital clock check out my demo example. It explores ways to:

Use as little internet as possible to consume less (Only short HTTP requests, very fast and then sleep)

Use an epaper as a mean of minimum possible consumption and persistance when the ESP32 is in deepsleep

Learn how to use ESP-IDF with C++. Without Arduino boilerpate functions, straight into Espressif own framework.