Date Time
Timezone Offset Calculator
Local hour from UTC hour and offset, wrapped to 0–24.
Free to use — no sign-up or login.
Local time
UTC time
Amortization schedule
| # | Date | Payment | Principal | Extra | Interest | Balance |
|---|---|---|---|---|---|---|
Choose a UTC date, a UTC time, and a named zone. The local result uses the browser’s time-zone data, so daylight saving follows that zone on that date. The list includes India at +5:30 and Nepal at +5:45 because a whole-hour offset would be wrong.
This is not a world clock. To rewrite 2:30 PM as 14:30 without changing zone, use the 24-hour clock. To add hours on one local clock, use the Hours Calculator.
A short list, not every city
The menu is UTC, US Eastern, US Central, US Pacific, London, central Europe, Istanbul, India, Nepal, Tokyo, and Sydney. Each name is an IANA zone, so a November date in New York is standard time and a July date is daylight time. Cities outside the list are not estimated.
Half-hour zones are first-class
India is five and a half hours ahead of UTC, and Nepal is five hours and forty-five minutes ahead. 15:00 UTC is 20:30 in India. A converter that only offers whole hours cannot state that time.
Worked example: 15:00 UTC on 13 November 2026 in Istanbul
UTC date 13 November 2026, UTC time 15:00, zone Istanbul. The local result is Friday, 13/11/2026, 18:00. The UTC line stays UTC 15:00. The same UTC time in India is 20:30.
\[ 15{:}00\,\mathrm{UTC}+3\,\mathrm{h}=18{:}00 \]
Frequently asked questions
Does Istanbul in this example use daylight saving?
Turkey’s zone in the browser data stays at UTC+3 in November 2026, so 15:00 UTC is 18:00.
Why is India not a whole hour?
India Standard Time is UTC+5:30. The page includes that offset so the minute is not rounded away.
Will US Eastern change between winter and summer?
Yes. The zone is America/New_York, so the browser applies eastern standard time or eastern daylight time for the date you enter.
Can I type a city that is not in the list?
No. The menu is the whole set. An unlisted city is not guessed from a longitude.
Is this a live world clock?
No. You enter the UTC moment. The page does not keep a ticking clock for each city.
References
Assumptions and limitations
Only the named zones are offered. Historical political changes to a zone are whatever the browser’s time-zone data contains, and the page is not a world clock.