Time Zone Converter
This time zone converter changes a time from one zone into another in a tap. Set the date and time, pick the zone it's in and the zone you want, and you'll see the converted time, the date there, and a day or night read. It uses your browser's built-in zone data, so daylight saving is handled for you, and a world clock shows the moment across major cities. It's free, private, and perfect for scheduling calls and travel.
- Any two zones
- Daylight saving aware
- Shows the date
- World clock
- Uses your zone
Last updated June 17, 2026 Daylight saving handled Reviewed by the Calcowa team
The date and time are read in the from zone. Daylight saving is applied automatically for the date you pick.
That moment around the world
How does converting time zones work?
Every time zone is an offset from UTC, the global reference clock, so converting between two zones means going through that shared moment. This tool takes the date and time you enter, reads it as the wall clock in your from zone, and works out the exact UTC instant it points to. Then it shows that same instant as the clock reads in your to zone. Because it uses your browser's built-in zone rules, it applies daylight saving for the specific date, which is why a July conversion and a January one between the same cities can differ by an hour. It also tracks the date, since far-apart zones can sit on different days at the same moment, so you'll never schedule a call a day early by mistake.
Converting a time, step by step
Here's the quick routine for scheduling across zones:
- 1
Set the timeEnter the date and time, or tap use right now.
- 2
Pick the from zoneChoose the zone that time is in, often yours.
- 3
Pick the to zoneChoose where you want it; tap swap to flip them.
- 4
Read and planYou'll see the converted time, date, and world clock.
Standard UTC offsets
A few major zones and their standard-time offset from UTC. Daylight saving shifts many of these by an hour in summer.
| City | Standard offset |
|---|---|
| Los Angeles | UTC minus 8 |
| New York | UTC minus 5 |
| London | UTC plus 0 |
| Dubai | UTC plus 4 |
| Tokyo | UTC plus 9 |
| Sydney | UTC plus 10 |
Frequently asked questions
You set a date and time, choose the zone it's in, and choose the zone you want it in. The tool turns your entry into a single moment in time, then shows that same moment as the local clock reads in the target zone, with the date and a day or night marker. It uses your browser's built-in time zone data, so it handles daylight saving automatically. Everything runs on your device, so you'll see the result update the instant you change anything.
Yes, that's the tricky part it takes off your hands. Each zone springs forward and falls back on its own schedule, so a fixed offset is not enough. The converter reads the actual rules for the date you pick, so a summer conversion and a winter conversion between the same two cities can differ by an hour, and you'll always get the offset that truly applies on that date.
Because zones far apart can sit on different calendar days at the same moment. When it's late evening in New York, it's already the next morning in Tokyo, so the converter shows the correct date in the target zone, not just the time. That's why it always displays the full date alongside the clock, so a call or meeting never lands on the wrong day by accident.
UTC is the global reference clock that every zone is measured against, with no daylight saving of its own. Your zone is UTC plus or minus a number of hours, like UTC minus 5 for New York in winter. The converter works by translating your time to that shared UTC moment first, then back out to the target zone, which is what keeps conversions consistent across any pair of cities.
Yes, below the main result the world clock shows your chosen moment across a set of major cities at a glance, so you can plan a call that works for everyone. It updates with the moment you set, so you'll see how a 3 pm meeting in one city lands for colleagues elsewhere. It's a quick way to find a slot that isn't the middle of someone's night.
Yes, it's completely free, with no sign-up and no limit. It runs entirely in your browser using built-in time zone data, so it's fast and private, and nothing you enter is sent anywhere. Bookmark it for scheduling calls, booking travel, catching a live stream, or coordinating across a remote team, and you'll have an accurate conversion, daylight saving included, in a second.
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