Alarm Clock disappeared

NOT talking about the clock in notification area, the one shown above is from my laptop. Help please.
 
I didn’t quite understand your issue from the photo. Could you please explain it more clearly?
On both my laptop's I believe it is an Alarm clock, World Clock & multiple timers. I've had this desktop for a few years & have reset it before & clock always came back, I do not believe it is an app.
 
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