Time Zone Converter
Pick a date and time, choose where it is now and where you want to know, and we convert it with the right daylight saving offset.
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The formula
Local time = UTC time + the zone offset on that date (offsets change with daylight saving).
Why the date matters
Offsets are not fixed. New York is 4 hours behind UTC in summer and 5 hours behind in winter. Because we use the actual date you enter, the answer is right for that day, including the weeks in spring and autumn when countries change clocks on different dates.
Planning a meeting across time zones
Pick a time in your own zone, convert to the others, and check that nobody lands in the middle of the night. A call at 9:00 in New York is 14:00 in London and 18:30 in Mumbai in early October. In late March the gap changes for a couple of weeks because the US and UK switch their clocks on different dates.
A few offsets worth knowing
- India is UTC+5:30 all year and does not change its clocks.
- Dubai is UTC+4 all year.
- Most of the US and Europe change clocks, but on different dates, so the gap between them briefly changes twice a year.
Examples to check
Type these into the calculator above to see how it behaves. Every result below was produced by the same calculator code that runs on this page.
| What you enter | What you get |
|---|---|
| Date: 2026-10-03; Time: 09:00; America/New York; Europe/London | Europe/London: Sat, Oct 3, 2026, 2:00 PM GMT+1 |
| Date: 2026-10-03; Time: 09:00; America/New York; Asia/Kolkata | Asia/Kolkata: Sat, Oct 3, 2026, 6:30 PM GMT+5:30 |
| Date: 2026-07-15; Time: 18:30; Asia/Kolkata; Australia/Sydney | Australia/Sydney: Wed, Jul 15, 2026, 11:00 PM GMT+10 |
| Date: 2026-01-10; Time: 12:00; UTC; Asia/Tokyo | Asia/Tokyo: Sat, Jan 10, 2026, 9:00 PM GMT+9 |
Time Zone Converter: frequently asked questions
Does it handle daylight saving time?
Yes. The conversion uses your browser's time zone database for the exact date you enter.
Why is my city not in the list?
We list major zones that cover most requests. Pick any city in the same time zone as yours.
What is UTC?
Coordinated Universal Time, the world reference clock. It never changes for daylight saving.
Does it take leap years into account?
Yes. Calculations use real calendar dates, including leap days and the different lengths of months.
Is what I enter in this calculator saved or sent anywhere?
No. The calculation runs in your browser, so what you enter is not sent to our servers. We only count, anonymously, whether a tool ran successfully.
Is this calculator free to use?
Yes. It is free, needs no sign-up and has no usage limit.
Last reviewed: October 3, 2026