Any variable that is %modulo operator with 1 will output 0. So that code is saying, 4167* (1 - 0) ... which is equivalent to 4167 * 1 equivalent to 4167.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Dozenal time is now stable, accurate to within about 1 second. A commit/pull request has been registered.
Overnight, when the watch has no use but of course still runs, sometimes it wakes up to being a bit behind. But soon it fixes itself, via GPS time.