Date & Time
Timezone Converter
Convert one time across multiple timezones - powered by your browser's Intl.
Source time
Target timezones
UTC
Sun, May 17, 2026, 12:13:00 PM
UTC+00:00
America/New_York
Sun, May 17, 2026, 08:13:00 AM
UTC-04:00
Europe/London
Sun, May 17, 2026, 01:13:00 PM
UTC+01:00
Asia/Tokyo
Sun, May 17, 2026, 09:13:00 PM
UTC+09:00
Quick add
Absolute instant
2026-05-17T12:13:00.000Z
Unix ms: 1779019980000
About this tool
Pick a date, a time and a source timezone, then see the same instant in any other timezone (UTC, IANA names like Europe/London or Asia/Kolkata). Powered by the browser's built-in Intl.DateTimeFormat - the same database your OS uses, so daylight-saving transitions are handled correctly.
FAQs
Which timezone names are supported?
Anything in the IANA database your browser ships - typically 400+ zones like America/New_York, Europe/London, Asia/Kolkata, Pacific/Auckland. Older 'EST' / 'PST' style aliases also work.
How are daylight-saving transitions handled?
Automatically via Intl.DateTimeFormat. If you pick a date in DST and the target timezone observes it, the offset shifts. Spring-forward / fall-back ambiguity is resolved using the rule each browser uses (typically 'earlier' for fall-back).
Why does the offset show +05:30 for India?
India Standard Time is UTC+5:30 - half-hour offsets are standard for IST, Iran, Nepal, parts of Australia and a few others.
Is anything sent to a server?
No. Conversions happen locally via the browser's Intl APIs - the same code path used by JavaScript Date methods. No requests are made.