Location guides

Clear explanations that support the location information.

How browsers detect a time zone

Understand the zone reported by browser internationalization APIs.

Distinguish geographic coordinates from civil clock rules.

Find the current difference between local time and UTC.

Understand what happens when a site requests coordinates.

Learn why device location results vary.

Convert a point on Earth into the appropriate civil time.

Minimize data collection when showing local information.

Understand how locale settings affect displayed information.