zhirzh 2845 days ago. https://zhirzh.github.io/gists/binary-clock/12hr.html https://zhirzh.github.io/gists/binary-clock/24hr.html source: https://github.com/zhirzh/zhirzh.github.io/tree/master/gists/binary-clock What's BCD? https://en.wikipedia.org/wiki/Binary-coded_decimal