Time Zone Converter
Convert any time between world time zones instantly. Add multiple zones to compare at a glance, or switch to live mode to see the current time everywhere. DST-aware via your browser's built-in Intl API — nothing leaves your device.
Current Time in UTC
Converted Times
America/New YorkGMT-4
May 12, 2026, 6:40:42 AM
Europe/LondonGMT+1
May 12, 2026, 11:40:42 AM
Asia/TokyoGMT+9
May 12, 2026, 7:40:42 PM
Add a Time Zone
How It Works
Pick your source zone
Choose the time zone your original time is in — for example New York or UTC — from the dropdown.
Set the time
Use Current Time mode to see live clocks, or switch to Custom Time and enter any date and time you need to convert.
Add target zones
Select any region from the Add a Time Zone picker. Add as many as you like and remove them with one click.
Read the results
Each zone shows the converted time and UTC offset. A day badge appears when the result falls on a different calendar day.
Why use this time zone converter?
- Your data never leaves your device — every conversion runs locally in your browser using the JavaScript
Intl.DateTimeFormatAPI, so the times and zones you enter are never stored or shared. - Instant results — conversions update as you type; there is nothing to upload and no server round-trip involved.
- DST handled automatically — Daylight Saving Time transitions are applied correctly for every IANA time zone based on the exact date you enter.
- No account needed — open the page and start converting; no sign-up, no cookies, no tracking.
How Time Zone Conversion Works
Every time zone is defined relative to Coordinated Universal Time (UTC). The tool translates
a moment in your source zone into an equivalent UTC timestamp, then re-renders that
timestamp in each of your target zones using your browser's built-in
Intl.DateTimeFormat engine. DST rules, historical offsets, and half-hour zones
(such as India Standard Time at UTC+5:30 or Nepal at UTC+5:45) are all handled automatically.
Common Uses
- Scheduling remote meetings: find an overlap between New York, London, and Tokyo without mental arithmetic.
- Planning travel: convert departure and arrival times so you always know what the clock will say when you land.
- Live event broadcasts: share a kickoff time in your zone and let viewers convert to theirs instantly.
- Global development teams: coordinate deployments, on-call handoffs, and stand-up calls across continents.
- Financial markets: track opening and closing times for exchanges in different regions.
- Freelancers & clients: confirm deadline times when you and your client are in different countries.
Understanding the Day Offset Badge
When the converted time falls on a different calendar date than the source, a small badge appears showing +1d or -1d. This is common when converting between zones separated by many hours — for example, a Monday evening in Los Angeles is already Tuesday morning in Tokyo (+1d), while a Tuesday morning in Tokyo is still Monday in Los Angeles (-1d).
Supported Time Zones
All standard IANA time zones are available — every region recognised by your browser's
built-in Intl API. This includes hundreds of zones covering every UTC offset,
all major cities, and every country's official regional zones.
| Region | Example zones |
|---|---|
| Americas | America/New_York, America/Chicago, America/Los_Angeles, America/Sao_Paulo |
| Europe | Europe/London, Europe/Paris, Europe/Berlin, Europe/Moscow |
| Asia & Middle East | Asia/Dubai, Asia/Kolkata, Asia/Singapore, Asia/Tokyo, Asia/Shanghai |
| Pacific & Oceania | Australia/Sydney, Pacific/Auckland, Pacific/Honolulu |
| Africa | Africa/Cairo, Africa/Lagos, Africa/Johannesburg |
| UTC & fixed offsets | UTC, Etc/GMT+5, Etc/GMT-8 |
Features
- Live current-time mode: real-time clock updates every second across all added zones.
- Custom time input: convert any past or future date and time, not just right now.
- Multi-zone comparison: add as many target zones as you need side by side.
- UTC offset display: each zone shows its current offset (e.g. GMT-5, GMT+9) so you always know the gap.
- Day offset badge: instantly see when a conversion crosses midnight into a different day.
- DST-aware: Daylight Saving Time is applied automatically for every IANA zone.
- Fully private: nothing is uploaded or stored — every conversion runs in your browser.
Frequently Asked Questions
How do I convert a time from one city to another?
Select the city or region in the Source Time Zone dropdown, then switch to Custom Time mode and enter your date and time. The converted result for every target zone you have added appears instantly.
Does the tool update automatically for Daylight Saving Time?
Yes. The conversions use your browser's built-in Intl.DateTimeFormat API, which applies the correct DST rules for every IANA time zone based on the specific date you enter. Entering a date in winter and one in summer will produce different UTC offsets wherever DST applies.
What does the day badge (+1d / -1d) mean?
The badge appears when the converted time falls on a different calendar day than the source time. A +1d badge means the target zone is already a day ahead; -1d means it is a day behind.
Can I compare more than two time zones at once?
Yes. Use the Add a Time Zone selector to add as many zones as you need. Each one appears as a separate row with its own converted time and UTC offset. Remove any zone by clicking the × button.
How is the source time interpreted?
When you enter a custom date and time, the tool treats it as a local time in the selected source time zone. It then converts that moment to UTC internally and re-renders it in every target zone.
Is my data safe?
Yes. All conversions run entirely in your browser — nothing is sent to or stored on any server.
Privacy & Security
Intl.DateTimeFormat API. The times and zones you enter are never transmitted to or stored on any server.