Smartphones know where you are, like a magical map inside your phone. When you travel, they use signals from satellites to figure out where you are and adjust the time so it matches the place you're at now.
Examples
- You wake up at 7 AM in Sydney, your phone knows that's the right time.
- You're on a train moving across different states, and your phone updates the time as it goes.
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See also
- Why Do Smartphones Automatically Adjust to Different Time Zones?
- How Does a Smartphone Actually Know Where You Are?
- How Can a Single Phone Know Where You Are?
- How Can a Phone Know Where You Are?
- How Does Your Phone Know You're Running?