You may face the problem that one camera on the monitor has two different names or two different times like the picture below.
It is because one name or time is given a camera and another one is given by the recorder system. Therefore, you can change one name in recorder system's main menu. But there is no option to change the camera's name or time.
To change the camera's name or time, you need access camera separately on a computer.
Here is the method.
After logging in camera separately on a computer browser, you can find the option to change the camera's name and time like the picture below.