The Time Zone Converter turns a date and time in one place into the matching date and time anywhere else. Enter a date, a time, the source zone, and the target zone, and it shows the converted time, the offset difference, and a world clock of the same moment across major cities.
It handles daylight saving time automatically for the date you pick — so a summer conversion and a winter conversion give the right answer, not a fixed offset. It is the tool for scheduling a call across countries, planning a trip, or working out when a deadline lands for a remote team. Everything runs in your browser.
How to use the time zone converter
- Enter the date and time you want to convert (it starts at the current moment).
- Choose the source time zone — where that time is.
- Choose the target time zone — where you want it converted to.
- Read the converted time, the difference, and the world clock below.
How time zone conversion works
Every time zone is defined as an offset from Coordinated Universal Time (UTC). To convert, the tool first turns your entered time into the single universal instant it represents, then expresses that instant in the target zone. Because both ends are tied to the same instant, the conversion is always consistent.
The offsets are not fixed, though: many regions shift by an hour for daylight saving in summer. This converter uses the actual offset in force on the date you choose, which is why the same pair of cities can be, say, 4.5 hours apart in one month and 3.5 in another.
Time zones of major cities
The table shows the standard (winter) and daylight (summer) offsets from UTC for some widely used zones. Regions that do not observe daylight saving — like India, the UAE, Japan, and China — keep one offset all year.
UTC offsets for major cities (standard / daylight).
| City | Standard | Daylight |
|---|---|---|
| Los Angeles | UTC−8 | UTC−7 |
| New York | UTC−5 | UTC−4 |
| London | UTC+0 | UTC+1 |
| Dubai | UTC+4 | — (no DST) |
| India (IST) | UTC+5:30 | — (no DST) |
| Tokyo | UTC+9 | — (no DST) |
| Sydney | UTC+10 | UTC+11 |
Tips for working across time zones
- Always confirm the date — daylight saving starts and ends on different dates in different countries, so the offset can change mid-week.
- When scheduling, share the time in UTC or name the city, not just “3 PM”, to avoid confusion.
- Southern-hemisphere zones (like Sydney) are on daylight saving during the northern winter, so the gap with Europe and the US swings by up to two hours across the year.
- For recurring meetings, re-check the time after each daylight-saving changeover.
Frequently Asked Questions
How do I convert time between two time zones?
Enter the date and time, pick the source zone and the target zone, and the converter shows the matching time in the target zone. It ties both to the same universal instant, so the result is exact.
Does this handle daylight saving time?
Yes. It uses the real offset in effect on the date you choose, so summer and winter conversions are both correct — the difference between two cities can change by an hour across the year.
What is the time difference between IST and EST?
India (IST, UTC+5:30) is 10.5 hours ahead of US Eastern Standard Time (EST, UTC−5) in winter, and 9.5 hours ahead of Eastern Daylight Time (EDT, UTC−4) in summer. Pick the exact date above for the precise difference.
Why does the time difference between two cities change?
Because many regions move their clocks for daylight saving at different times of year, and some do not observe it at all. The gap depends on whether each city is currently on standard or daylight time.
What is UTC?
Coordinated Universal Time is the global reference that every time zone is defined against, as a fixed offset. It does not change for daylight saving, which makes it a reliable way to state a time unambiguously.