Pick a date and time, tell this tool which time zone it's in, and it shows the equivalent wall-clock time in any other time zone — including your own, detected automatically. Conversions account for daylight saving time using each zone's real rules, not a fixed UTC offset.
Everything runs in your browser using the time zone database built into it — nothing is sent to a server.
Does this account for daylight saving time?
Yes — conversions use each time zone's real rules for the specific date you enter, not a fixed UTC offset, so daylight saving transitions are handled correctly.
How is my local time zone detected?
From your browser's own settings, once the page loads — the prerendered page itself never assumes a time zone, since that would be wrong for anyone reading it from a different one.
Is my date and time sent to a server?
No — the conversion runs entirely in your browser using its built-in time zone database.