Not TestedTesting not done, may not work properly
Browser Information

Time Zone API

Query user's local IANA timezone name and UTC offset.

Checking support...
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Interactive Input Workspace

Ready for input

Web API Execution Output

Result output will be displayed here after processing...

Native JavaScript Code Example (Zero Libraries)

console.log(Intl.DateTimeFormat().resolvedOptions().timeZone);

About the Time Zone API Web API

Intl.DateTimeFormat().resolvedOptions().timeZone exposes local timezone string.

Specification:W3C & WHATWG Web API Standard
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