You can see the time on your Home screens by adding a widget from the Clock app. Add a clock widget Touch and hold any empty section of a Home screen. At the bottom of the screen, tap Widgets.
Change your clock's display You can choose how your Clock app looks and how it shows the time.
You can change your clock’s settings, including the date, time and time zone. You can set how your alarms and timers work and add clocks for other cities. Change time and time zone
Set time, date and time zone - Clock Help - Google Help
You can choose how your Clock app looks and how it shows the time. Switch between analog & digital Open your phone's Clock app