Please refer the user manual to set the time and date. Sporty solar-power watch with multiple functions including multi-band atomic timekeeping, low temperature resistance (-10 C/14 F), altimeter, digital compass, barometer, thermometer LED backlight with after-glow, world time, sunrise/sunset data, five daily alarms, 1/10-second stopwatch, countdown timer Auto calendar (pre-programmed until 2099), 12/24-hour formats, battery level indicator, and power-saving function, Approximate battery life: 7 months on full charge (Without further exposure to light) 46-mm stainless steel case with mineral dial window, Atomic timekeeping with digital display, Resin band with buckle closure Water resistant to 100 m (330 ft): In general, suitable for swimming and snorkeling, but not scuba diving