What is a time zone?

A time zone identifies rules for interpreting dates using regional standard time and daylight saving time. IANA identifiers such as Asia/Tokyo and America/New_York are widely used.

How NetKarte obtains it

The Time zone field in NetKarte's Browser card shows the identifier exposed by the current runtime. Compare it with the time display settings you intend to use on the device, rather than requiring it to match the region estimated from your IP.

NetKarte uses Intl.DateTimeFormat().resolvedOptions().timeZone to show the time zone selected by the browser's JavaScript environment. It is not estimated from GPS or IP geolocation.

How to read the result

Asia/Tokyo means the browser environment is configured to use Japan Standard Time rules. OS, browser, or virtual-environment settings may differ from the user's actual location.

Notes

A time zone can be a location clue but does not prove an exact location or nationality. NetKarte does not combine it with other values into an identifying ID.

A mismatch with IP location is not necessarily wrong

An illustrative Asia/Tokyo time zone can coexist with an IP estimate in another country: device settings and the network exit differ. Time zone is not a location measurement. Zones sharing a UTC offset may also have different daylight-saving or historical rules.

For incorrect times, check the device clock separately from its time zone, then run diagnostics again. Virtual environments and privacy settings can affect values. NetKarte does not compare your clock with an accurate time source or measure clock drift.