To change the clock face / time and date format on your Smart Activity Tracker AM 1700/1703/1704 go to the "Functions" menu and tap till you get to the clock-icon. Press on the icon and hold till the tracker vibates softly. Now tap through the different clock face options and select your favourite by pressing on it. Hold till your selection is confirmed by a soft vibration of the tracker.
The tracker receives the time and the date via Bluetooth from your smartphone. It is therefore important that you connect your tracker to the FITvigo app at least every few days, so that your collected data can be transferred and the date and time reconciled.