How to remove a moon mark on the upper right of Apple's mobile phone?

How to remove a moon icon on the upper right of Apple's mobile phone?

Best answer:

If a "moon" icon appears on the top of Apple's mobile phone, it means that you have turned on the new function "Do Not Disturb Mode" and are now in a state of Do Not Disturb. So turn it off in the phone settings.

The closing mode is as shown in the figure:

There is a moon button. Click Close. Do it.