Geography & Earth
Basic

Time Zone Offset

Hours difference from longitude difference.

Formula

Δt=Δlongitude15°\Delta t = \frac{\Delta\text{longitude}}{15\degree}

Variables

\Delta longitudeDegrees apart

Example

15° = 1 hour

Did You Know?

The world's 24 time zones were standardised only in the 1880s, driven by the spread of railways.

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