I just posted my Arduino-based Clock library on github GitHub - rudyfr/arduinoClock: An object-oriented clock library for Arduino, free for non-commercial hobbyist and educational use.
I followed guidelines for a project, including a readme, sample sketches in the Examples folder, keywords file, and docs (created with Doxygen, see Docs/html/index.html). I hope I did not miss anything too critical.
This project was a learning exercise for me, I'm giving back as partial thanks for all the help I found in this forum. Enjoy!
Regards,
Rudy