TimezoneToolbox

Time zone converter

Pick a moment in one place and see it everywhere else, on the right date, with daylight saving applied for that exact day.

The converter loads in your browser, because it needs your local time and time zone.

Popular conversions

Common times

All 128 zone-to-zone converters

One instant, three dates

The same moment can fall on three different calendar days. Clock offsets run from UTC−12 to UTC+14, a 26-hour spread, so for a couple of hours every day part of the world is on "yesterday", most is on "today" and a sliver of the Pacific is already on "tomorrow".

Drag the slider through a single day of Coordinated Universal Time. Watch Kiritimati (UTC+14) flip to Thursday at 10:00 UTC while Pago Pago (UTC−11) is still finishing Tuesday. That is why a converter has to show the date, not just the hour.

Zones are ultimately bookkeeping for where the Sun stands over a turning Earth; the Moon runs a calendar of its own, and ahaboo narrates why it waxes and wanes through the month.

Right now in this lesson: 1 of these cities are still on Tuesday, 13 are on Wednesday, 1 have reached Thursday.

  1. KiritimatiUTC+14Thu 0:00
  2. AucklandUTC+13Wed 23:00
  3. SydneyUTC+11Wed 21:00
  4. TokyoUTC+9Wed 19:00
  5. ManilaUTC+8Wed 18:00
  6. MumbaiUTC+5:30Wed 15:30
  7. DubaiUTC+4Wed 14:00
  8. BerlinUTC+2Wed 12:00
  9. LondonUTC+1Wed 11:00
  10. São PauloUTC−3Wed 7:00
  11. New YorkUTC−4Wed 6:00
  12. ChicagoUTC−5Wed 5:00
  13. Los AngelesUTC−7Wed 3:00
  14. HonoluluUTC−10Wed 0:00
  15. Pago PagoUTC−11Tue 23:00

Cities run from the easternest offset (UTC+14) down to UTC−11. Offsets are for mid-October 2026, from the tz database.

Current time around the world

Build your own world clock · All places

How to read the results

Each row shows the converted time, its date, the zone abbreviation in use on that date, the UTC offset and how far ahead or behind your source it is. Underneath, the hour rail lays out the source day hour by hour in that place: dark cells are night, mid-blue cells are early morning and evening, and pale cells are 9 to 6 working hours. The orange marker is the moment you picked.

Your source and list are remembered on this device (see privacy). Use "Copy share link" to send the same comparison to a colleague. Looking for a slot that suits a whole team? MeetingTimePro is built for exactly that kind of planning.

Questions

How does this time zone converter work?

Pick a source place, a date and a time, then add as many places as you like. Your browser converts the moment with its built-in copy of the IANA time zone database, so daylight saving changes on the chosen date are applied automatically.

Does it handle daylight saving time?

Yes. The converter works out the offset for the exact date you enter, not today’s offset. If you type a clock time that is skipped when clocks jump forward (for example 2:30 am on the US spring-forward Sunday), it tells you and shows the moment clocks resumed.

Why does the result say "next day" or "previous day"?

Zones up to 26 hours apart can be on different calendar dates at the same instant. When a destination has already passed midnight relative to your source, it is marked "next day"; when it has not reached it yet, "previous day".

Is the AI needed to convert times?

No. The optional plain-English box uses an AI model only to read a sentence like "9am Monday in Chicago to Berlin" into the fields. The conversion is always done by your browser from the time zone database.

Why is EST sometimes 4 hours behind UTC?

Because people say "EST" all year, but from March to November the US East Coast is on EDT, which is UTC−4. In winter it is UTC−5. This site follows what the clocks in New York actually show.