Iphone display clock widget
When you add Clock widget, the default time above is Cupertino (the city where Apple is headquartered), so it will make us think that the displayed time is "incorrect", and we just need to set it to switch to local time.
Long press the clock widget, and then click Edit Widget:
Click on the input box below to select your city or region.
If you need to see the time in many different cities or regions, you can use the world clock widget that displays multiple times:
1. Long press the blank space of the home screen to enter the editing home screen interface, click the "+"in the upper left corner, select the world clock, and add widgets.
2. When you use the World Clock widget, you can press and hold the widget and click Edit widget to set the cities you want to see and arrange them in order.