World clock

Hi Neetu1210,

For help with using the World Clock feature, test the steps below found in the guide here: See the time in cities worldwide on iPhone

"Use the Clock app to see the local time in different time zones around the world.

1. Tap World Clock.
2. To manage your list of cities, tap Edit, then do any of the following:

• Add a city: Tap , then choose a city.
• Delete a city: Tap .
• Reorder the cities: Drag  up or down."

If you're looking for the feature while using an Apple Watch, the article here will help: Use World Clock on Apple Watch to check the time in other locations

Additionally, you can test a normal restart of the device you're using to help.

Cheers.