To reset the time correctly for summer time or winter time, press the re-set button ( see number 5 below) with a pin. Then power on the watch back by holding the silver button for about 3 seconds (see number 3 below).  The watch will show correctly within a few of minutes once the watch locates a signal.  The time may initially reset incorrectly by 1 hour before the time sets correctly as it may take a few minutes for the watch to find the mobile signal. If you are indoors or you may need to be at a window or outside for the watch to pick up the signal.

You will not lose any information or settings by pressing the reset button.