[Glossary](https://useratio.app/glossary) › Dates and time

# Time zone

A region that keeps the same clock time, set as an offset from UTC.

When it is 15:00 in London, it is already evening in Tokyo. Daylight saving time moves the offset twice a year in many places, which is why converting by hand goes wrong.

Name the cities and Ratio does the conversion, including daylight saving.

## In Ratio

| You type | Ratio shows |
| --- | --- |
| `15:00 London in Tokyo` | Thu 23:00 |
| `now in New York` | Thu 14:39 EDT |

## Related

[Time zone calculator](https://useratio.app/time-zone-calculator) · [All terms](https://useratio.app/glossary)

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Source: https://useratio.app/glossary/time-zone