Someone else has had some strange issues that sound a bit similar too: https://github.com/espruino/BangleApps/issues/2575
Is it possible that somehow the Android phone itself has got set up such that it thinks its 'home' timezone is in CEST now?
@Gordon started
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.
Someone else has had some strange issues that sound a bit similar too: https://github.com/espruino/BangleApps/issues/2575
Is it possible that somehow the Android phone itself has got set up such that it thinks its 'home' timezone is in CEST now?