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Time & Date tool

Event Time Announcer

Turn one local event time into a precise UTC instant and readable local times for up to eight regions.

Free · Private · Runs in your browser

Share one exact instant

Announce an event across time zones

Create a link whose input fields describe the same event time for every reader.

Choose 1–8 full IANA identifiers. Repeated or nonexistent transition times are rejected instead of guessed.

The event's UTC instant and local displays will appear here.

What the shared link contains

The URL stores only the event title, entered local date-time, source zone, and requested display-zone identifiers. Each visitor's browser recalculates the offsets from the same exact inputs. Nothing is uploaded by this tool.

Transition safety

Aletheia rejects local clock readings that never occurred or occurred twice during a daylight-saving transition. Use the Time Zone Converter if you need to select the earlier or later occurrence.

Boundary

This is a current civil-time utility for 1970–2100, not proof of historically authoritative local time and not a legal scheduling service. Calculation version 1.0.0.

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