Why did the WeChat circle of friends just say that it was a day ago?

In this case, your mobile phone date is not set correctly, so you can set the date. The specific operation is as follows:

1. Open the phone, find the "Settings" icon and click it.

2. Then open General.

3. Then click "Date and Time" to set it according to the actual time.

Extended reading:

The settings of Apple mobile phone and Android mobile phone are somewhat different, but the steps are similar, which can be solved with a little thought.