The right hand button rotates to turn the display on or off..while off it seems to stay on the time you turned it off..(I guess it really does mean energy saving!) The light button when turned and pressed will at one press make the time and date flash back and forth, but if you hold it in the setting sequence starts with the month, day, hour, min..then press the right hand button to change any of those settings, then turn the light switch back and press the other one and it starts running..at least so far. The watch was adveritsed as a 1976, but the stamp on the inside sayd 78..same year I graduated high school! (But since Dad HATED Timex, I had to buy my own! LOL) Hope this helps
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