The time and weather displayed on my HTC main interface suddenly disappeared. How to set it?

It's not that complicated. The time and weather on the main interface is actually a widget.

Don't worry, this has nothing to do with ROOT. You can do as I say.

There are two ways,

First, return to the main interface. Press and hold the screen for 3 seconds and an option will pop up. You can select Time in Gadgets.

Second, it is also feasible to back up your important information and then directly restore the factory settings.

The first method is relatively simple, but I don't know if you can operate it. You should be new to Android, right? You can ask a friend to add it for you as I said. The second method is rude, but easy to use. After restoring the factory settings, almost any problem of the same type can be solved, but remember to back up your important information and hope to adopt it.