Timezone Converter
Convert times between world time zones instantly in your browser. Supports all major IANA time zones. No data leaves your device.
| Location | Local Time | |
|---|---|---|
| UTC← source | 17/05/2026, 01:28:00 | |
| London | 17/05/2026, 02:28:00 | |
| Paris / Berlin | 17/05/2026, 03:28:00 | |
| Helsinki | 17/05/2026, 04:28:00 | |
| Istanbul | 17/05/2026, 04:28:00 | |
| Moscow | 17/05/2026, 04:28:00 | |
| Dubai | 17/05/2026, 05:28:00 | |
| Mumbai | 17/05/2026, 06:58:00 | |
| Bangkok | 17/05/2026, 08:28:00 | |
| Singapore | 17/05/2026, 09:28:00 | |
| Shanghai | 17/05/2026, 09:28:00 | |
| Tokyo | 17/05/2026, 10:28:00 | |
| Sydney | 17/05/2026, 11:28:00 | |
| Auckland | 17/05/2026, 13:28:00 | |
| Honolulu | 16/05/2026, 15:28:00 | |
| Anchorage | 16/05/2026, 17:28:00 | |
| Los Angeles | 16/05/2026, 18:28:00 | |
| Denver | 16/05/2026, 19:28:00 | |
| Chicago | 16/05/2026, 20:28:00 | |
| New York | 16/05/2026, 21:28:00 | |
| São Paulo | 16/05/2026, 22:28:00 | |
| Buenos Aires | 16/05/2026, 22:28:00 | |
| Cairo | 17/05/2026, 04:28:00 | |
| Nairobi | 17/05/2026, 04:28:00 | |
| Lagos | 17/05/2026, 02:28:00 |
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Timezone conversion is the process of expressing a moment in time using the local clock offset of a different geographic region. Earth is divided into approximately 24 standard time zones, each offset from Coordinated Universal Time (UTC) by a whole or half-hour increment. The IANA Time Zone Database (also called the Olson database) maintains the authoritative list of time zone identifiers (like 'America/New_York' and 'Asia/Tokyo') along with their UTC offsets, Daylight Saving Time rules, and historical transitions.
Daylight Saving Time (DST) complicates timezone arithmetic because the UTC offset for many zones changes twice per year. The US Eastern timezone is UTC-5 (EST) in winter and UTC-4 (EDT) in summer. Europe/London is UTC+0 in winter and UTC+1 in summer. A naive offset-based conversion without DST awareness produces incorrect results for half the year in affected regions. The Intl.DateTimeFormat API in modern JavaScript uses the IANA database and automatically applies the correct DST offset for any given date.
This tool converts a user-specified date and time from a selected source timezone to the local time in 25 major world cities, using the browser's built-in Intl.DateTimeFormat API. Because the Intl API references the bundled IANA database, DST transitions are handled automatically and correctly for any input date. Results are displayed in a table with the city name, timezone identifier, UTC offset, and formatted local time — each row individually copyable.
Common Use Cases
Scheduling international team meetings and calls
Remote teams with members in different continents need to find a meeting time that falls within business hours for all participants. A team lead in San Francisco scheduling a call with colleagues in London, Berlin, and Singapore converts 9:00 AM Pacific to all four timezones simultaneously to confirm the time works for everyone. Seeing all local times in a single table eliminates the back-and-forth of checking each timezone individually.
Publishing time-sensitive content for a global audience
Marketers, event organizers, and content creators publishing webinars, product launches, flash sales, or live streams must communicate the start time in their audience's local timezone. Converting the event time from the organizer's timezone to the key audience timezones — and listing all conversions in the event announcement — prevents confusion and no-shows caused by timezone misinterpretation.
Debugging timestamp discrepancies in distributed systems
Distributed systems log events in UTC, but engineers investigating incidents often think in local time. When a production alert fires at 03:47 UTC, an engineer in New York needs to know that's 23:47 EDT the previous evening; one in Tokyo knows it's 12:47 JST the same day. Converting the UTC incident timestamp to all relevant team timezones helps correlate events with business context — was the spike during working hours, a deployment window, or an overnight period?
How to Use
- Enter a date and time using the datetime picker.
- Select the source timezone — the timezone the entered time belongs to.
- The table instantly shows the equivalent local time in 25 major world cities.
- Click Copy on any row to copy that city's local time string.
- Use the results to schedule meetings, set deadlines, or coordinate across time zones.
Key UTC Offsets
- UTC+0 — London (GMT, no DST in winter)
- UTC+1 / +2 — Paris, Berlin (CET/CEST with DST)
- UTC+3 — Istanbul, Moscow
- UTC+5:30 — Mumbai (India Standard Time)
- UTC+8 — Singapore, Shanghai
- UTC+9 — Tokyo
- UTC−5 / −4 — New York (EST/EDT with DST)
- UTC−8 / −7 — Los Angeles (PST/PDT with DST)
About DST
Daylight Saving Time (DST) shifts clocks forward by 1 hour in spring and back in autumn. Offsets change automatically based on the selected date, so conversions are always accurate.