@Numerist has also mentioned problems with accuracy of the clock. I am struggling to find the thread, but the fact that he wanted to use GPS time may have been a red herring/distraction from whatever @malaire is also seeing.
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.
@Numerist has also mentioned problems with accuracy of the clock. I am struggling to find the thread, but the fact that he wanted to use GPS time may have been a red herring/distraction from whatever @malaire is also seeing.