Convert a moment between world time zones and compare it across major cities. Runs locally.
How to use the timezone converter
Pick a date and time, choose your source time zone, then add the destination zones you care about. The tool applies each zone’s current UTC offset — including daylight-saving shifts where they apply — so you see the exact local time on the other end without doing mental math.
Why daylight saving trips people up
Offsets are not fixed: many regions shift by an hour twice a year, and some shift on different dates than others. A country you called at 9 a.m. last month may be an hour off today. This tool reads the current offset for each zone, which is why it beats a static chart.
Tips for scheduling across zones
When booking a call, always write the time zone abbreviation next to the hour (for example, “3 p.m. ET / 8 p.m. GMT”). It removes almost all ambiguity, and double-check the date too when the zones sit on opposite sides of the international date line.
How the time zone converter works
The converter uses your browser’s built-in Intl date engine, which knows every major time zone and applies daylight saving time automatically for the date you pick. You enter a time in one zone, and the tool computes the true UTC instant behind it, then re-displays that same moment in any other zone you choose — including a side-by-side view of several cities at once.
Because the rules are applied per date, a meeting scheduled in July shows the correct summer offset while one in January shows the winter offset, with no manual DST adjustment from you.
Common uses
- Remote meetings — find a slot that works across continents.
- Travel — know what local time a flight or call lands at.
- Family and friends — call overseas without waking anyone up.
- Deadlines — confirm exactly when a “11:59 PM PST” cutoff hits your clock.
Frequently asked questions
Does it handle daylight saving time?
Yes. The browser’s time-zone database includes DST rules and applies them for the specific date you enter.
Why do some zones show a half-hour offset?
A few regions (such as India and parts of Australia) use 30- or 45-minute offsets by national choice, and the converter reflects them exactly.
Which cities are supported?
The converter covers the world’s major IANA time zones, with quick presets for popular business and travel cities.
Do I need to be online?
No. The time-zone database lives in your browser, so conversion works offline.
Why is my converted time an hour off?
Almost always it is a daylight-saving mismatch — one zone has switched to summer time and the other has not yet. Pick the exact date and the tool applies the correct rule automatically.
What if my city isn’t in the list?
Pick the time zone that matches it; most cities share a zone with a listed one, or choose a major city in the same zone — the offset will be identical.
Standard offsets to UTC
| Zone | Standard offset | Notes |
|---|---|---|
| UTC | 0 | The reference point |
| London (GMT) | +0 | BST is +1 in summer |
| Central Europe (CET) | +1 | CEST is +2 in summer |
| US Eastern (EST) | −5 | EDT is −4 in summer |
| US Central (CST) | −6 | CDT is −5 in summer |
| US Mountain (MST) | −7 | Arizona does not shift |
| US Pacific (PST) | −8 | PDT is −7 in summer |
| India (IST) | +5:30 | Half-hour offset |
| China (CST) | +8 | Single zone across the country |
| Japan (JST) | +9 | No daylight saving |