The time on the Huawei P20 Pro may not be displayed in 24-hour format, but in 12-hour format. This means that the addition "morning" or "afternoon" is then added to the time.
If you do not want this, the following article shows you how to set the 24h time format on the Huawei P20 Pro.
1. Open the Settings
2. Now navigate to "System" and continue to "Date & Time"
3. In this submenu you will see "24-hour format" - move the slider to "On" to use this time format from now on.
From now on afterwards, all times are displayed in this time format on the Huawei P20 Pro.
This means that the 24h format is active in the status bar and in the weather widgets.