Time Zone Converter
It converts a date and time from one city to another, with daylight saving handled automatically for the specific date you enter.
09:00 in New York is
2:00 PM
Source offset
UTC-05:00
Target offset
UTC+00:00
Difference
+5 h
Source zone
EST
Target zone
GMT
Same day
Yes
| City | Local time | Offset |
|---|---|---|
| UTC | 2:00 PM | UTC+00:00 |
| Los Angeles | 6:00 AM | UTC-08:00 |
| Denver | 7:00 AM | UTC-07:00 |
| Chicago | 8:00 AM | UTC-06:00 |
| New York | 9:00 AM | UTC-05:00 |
| São Paulo | 11:00 AM | UTC-03:00 |
| London | 2:00 PM | UTC+00:00 |
| Paris | 3:00 PM | UTC+01:00 |
| Berlin | 3:00 PM | UTC+01:00 |
| Moscow | 5:00 PM | UTC+03:00 |
| Lagos | 3:00 PM | UTC+01:00 |
| Johannesburg | 4:00 PM | UTC+02:00 |
| Dubai | 6:00 PM | UTC+04:00 |
| Mumbai / Delhi | 7:30 PM | UTC+05:30 |
| Singapore | 10:00 PM | UTC+08:00 |
| Shanghai | 10:00 PM | UTC+08:00 |
| Tokyo | 11:00 PM | UTC+09:00 |
| Sydney | 1:00 AM | UTC+11:00 |
| Auckland | 3:00 AM | UTC+13:00 |
What it calculates
It converts a date and time from one city to another, with daylight saving handled automatically for the specific date you enter.
Why it matters
Offsets are not fixed. Countries shift on different dates, some never shift at all, and a few sit on half-hour boundaries — which is how meetings get missed.
Who it's for
Distributed teams scheduling calls, travellers, and anyone booking across borders.
Formula
- Offset
- Hours and minutes ahead of or behind UTC
- DST
- Daylight saving, which shifts the offset seasonally
- IANA
- The standard time zone database, keyed by city
Worked example
09:00 in New York on 15 January
- 1New York is on EST in January, UTC−5
- 2London is on GMT in January, UTC+0
- 3The difference is 5 hours
14:00 in London the same day
How the time zone converter works
Offsets are resolved from the standard IANA time zone database for the exact date you enter, rather than from a fixed table. That matters because the difference between two cities is not constant: New York and London are five hours apart for most of the year but four for the fortnight in spring when the US has moved to daylight saving and Europe has not. Southern hemisphere zones run the opposite way, and India, parts of Australia and Newfoundland sit on half-hour offsets.
Offsets are resolved from the IANA time zone database for the exact date you enter, rather than from a fixed table. That matters because the gap between two cities is not constant.
New York and London are five hours apart for most of the year but four for the fortnight each spring when the US has moved to daylight saving and Europe has not. Southern hemisphere zones shift the opposite way, and several zones sit on half-hour offsets.
Common mistakes
- Assuming the gap between two cities is fixed all year.
- Forgetting the northern and southern hemispheres change clocks in opposite seasons.
- Overlooking half-hour zones such as India, at UTC+5:30.
Tips and best practice
- For recurring meetings, check the time again after each clock change — the gap may have moved.
- Scheduling in UTC avoids the problem entirely for technical teams.
- The changeover dates differ between countries, so there are always a few weeks of unusual gaps.
Frequently asked questions
What time is it in another country?
Enter the date and time you have, pick the city it applies to and the city you want, and the converter resolves the offset for that exact date including daylight saving.
Does this handle daylight saving?
Yes. Offsets come from the IANA database for the specific date entered, so a January conversion and a July one give different results wherever clocks change.
Why does the time difference between two cities change?
Because countries switch to daylight saving on different dates, and some not at all. New York and London are usually five hours apart but four for a couple of weeks each spring.
Which time zones are not whole hours?
India is UTC+5:30, parts of Australia UTC+9:30, and Nepal UTC+5:45. Newfoundland runs at UTC−3:30.
What is UTC?
Coordinated Universal Time, the reference every other zone is expressed against. It does not observe daylight saving, which is why technical systems schedule in it.
Related calculators
Methodology & trust
- Formula source
- IANA time zone database via the ECMAScript Intl API.
- Last updated
- 2026-07-28
- Privacy
- Every calculation runs in your browser. No inputs are sent to a server or stored.
- Accessibility
- Keyboard navigable, labeled inputs and WCAG AA color contrast.