Time Zone Converter
Convert time between different time zones around the world. World clock with time difference calculation.
Time Zone Selector
Tips
- 1. Add cities you work with frequently.
- 2. Use live world clock for meeting planning.
- 3. Converter handles DST automatically via IANA zones.
World Clock
Time Zone Converter
Major Time Zone Reference
Standard offsets from UTC. Many zones shift +1 hour during daylight saving time (marked DST) — this converter applies those shifts automatically for the date you pick.
| Time Zone | City | UTC Offset | DST? |
|---|---|---|---|
| Pacific Time (PT) | Los Angeles, Vancouver | UTC−8 | Yes (PDT, −7) |
| Mountain Time (MT) | Denver, Calgary | UTC−7 | Yes (MDT, −6) |
| Central Time (CT) | Chicago, Mexico City | UTC−6 | Yes (CDT, −5) |
| Eastern Time (ET) | New York, Toronto | UTC−5 | Yes (EDT, −4) |
| Brasília Time (BRT) | São Paulo | UTC−3 | No (since 2019) |
| Greenwich Mean Time (GMT) | London | UTC+0 | Yes (BST, +1) |
| Central European Time (CET) | Paris, Berlin, Madrid | UTC+1 | Yes (CEST, +2) |
| Moscow Time (MSK) | Moscow, Riyadh area varies | UTC+3 | No |
| Gulf Standard Time (GST) | Dubai | UTC+4 | No |
| India Standard Time (IST) | Mumbai, Delhi | UTC+5:30 | No |
| China Standard Time (CST) | Beijing, Shanghai | UTC+8 | No |
| Japan Standard Time (JST) | Tokyo, Seoul (KST) | UTC+9 | No |
| Australian Eastern (AEST) | Sydney | UTC+10 | Yes (AEDT, +11) |
| New Zealand (NZST) | Auckland | UTC+12 | Yes (NZDT, +13) |
Coordinating Across Time Zones: Practical Rules
Always store and send UTC
Databases, APIs, and logs should hold UTC. Convert to local time only at the display layer. This eliminates the entire class of "the meeting was an hour off" bugs around DST transitions.
Prefer IANA zone names
Use America/New_York, not "EST" or "UTC−5". The IANA name carries the full DST history and rules; a fixed offset does not. This converter uses IANA identifiers internally.
The DST meeting trap
US and Europe shift to summer time on different dates (US: 2nd Sunday of March; EU: last Sunday of March). For 2–3 weeks each spring and autumn, transatlantic offsets are one hour off their usual value — re-verify recurring meetings then.
Odd-offset zones exist
India is UTC+5:30, Nepal UTC+5:45, parts of Australia UTC+9:30. Never assume whole-hour offsets when calculating by hand — verify with the converter instead.
Frequently Asked Questions
Does this converter handle daylight saving time (DST)?
Yes. Conversion uses IANA time zone identifiers with browser `Intl` APIs, so DST offsets are applied automatically by date.
Can I track multiple cities at once?
Yes. Add multiple cities in the selector and the world clock panel updates all selected zones in real time.
How accurate are the offsets?
Offsets are computed from timezone-aware formatting in your browser and reflect standard + daylight offsets for the selected date.
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