Watch time / data: press the right up button to show time press twice to show date; Adjust time and data press the right up button to show time and then press the right down button (with needle thing pressing the hours light flash and then press the right up button to adjust the digit; After adjusting the hour and then press the right down button to adjust minute; By parity of reasoning to adjust the date; The upper screen shows hour the upper layer is tens digit the lowered layer is units digit; The lower screen shows minute the upper layer is tens digit the lowered layer is units digit; By parity of reasoning to check the date