How to turn off clock light after engine is off

Please help. Why my clock light stays on after the car is shut off? I first noticed this today. I didn’t use my car for several days and my battery went dead.
Thank you,
George

 

what is clock light?

 

I was referring to the clock itself being on display. Fortunately, I found the problem. Although the rest of the panels were off, the keyless button had I light yellow light on. I just pressed it and the clock went off.

 

I'd be pretty surprised if the clock being on is killing a healthy battery, even with weeks at a time between starts.