On the left side of the monitor, there are two buttons... one with an arrow pointing down ????and one that looks like a clock ????.   (Note: these indicators may be blue on your machine)

1. Press and hold the “clock” button until you see the year flashing in your display screen. 

2. Press the arrow button to advance the numbers to the correct year, then press the clock bottom again to set it. 

3. Press the clock button again to display the month. 

4. Press the arrow button to advance the numbers to the correct month and then press the clock button to set. 

5. Continue this process for setting the day, hour and minutes. 

p.s.  if you happen to advance beyond the current year… It will require unplugging the machine and removing the batteries and reinstalling them and plugging it back in to be able to set to the current year.