How to use Time Zone Converter
The time zone converter translates a specific date and time across multiple world time zones simultaneously, showing local times for major global cities and regions. It supports Daylight Saving Time adjustments automatically, making it accurate year-round for scheduling international meetings, flights and calls.
- Enter a reference date and time.
- Select the source time zone.
- View the converted times for all listed time zones.
- Search for any IANA time zone by city or region name.
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UTC offsets and Daylight Saving Time
Every time zone is defined as an offset from UTC (Coordinated Universal Time). UTC+0 is GMT; New York is UTC−5 in winter (EST) and UTC−4 in summer (EDT). DST transitions shift clocks forward by 1 hour in spring and back in autumn, affecting about 70 countries. The exact transition date varies by country and year; this tool uses IANA time zone data for accurate DST handling.
Worked examples
New York to London (summer)
Inputs: 3:00 PM New York (EDT, UTC−4)
Result: 8:00 PM London (BST, UTC+1)
Los Angeles to Mumbai (winter)
Inputs: 9:00 AM Los Angeles (PST, UTC−8)
Result: 10:30 PM Mumbai (IST, UTC+5:30)
UTC noon, DST matters
Inputs: 12:00 UTC → New York
Result: 7:00 AM EST (winter) / 8:00 AM EDT (summer)
Common time-zone abbreviations and their UTC offsets
| Abbreviation | Region | UTC offset (standard / DST) |
|---|---|---|
| EST / EDT | US Eastern | UTC−5 / UTC−4 |
| CST / CDT | US Central | UTC−6 / UTC−5 |
| PST / PDT | US Pacific | UTC−8 / UTC−7 |
| GMT / BST | United Kingdom | UTC+0 / UTC+1 |
| CET / CEST | Central Europe | UTC+1 / UTC+2 |
| IST | India | UTC+5:30 (no DST) |
| JST | Japan | UTC+9 (no DST) |
Glossary
- UTC
- Coordinated Universal Time — the world's primary time standard with no DST adjustment.
- DST
- Daylight Saving Time — a seasonal clock adjustment used in many countries.
- IANA time zone
- A time zone identifier like "America/New_York" from the official time zone database.
- UTC offset
- The signed hour/minute difference between local time and UTC at a specific moment.
Related reading
Frequently Asked Questions
Why use Time Zone Converter?
- Converts a single date and time into every listed zone at once, removing manual offset arithmetic
- Automatically applies DST transitions so results are accurate in summer and winter
- Supports any IANA time zone by name, covering thousands of cities and regions worldwide
- Shows both local time and UTC offset per zone so international schedules are unambiguous
Common use cases
- Find a meeting time so London, New York and Singapore participants all join at a reasonable hour
- Confirm what local time a webinar starts before registering for it
- Check whether a flight arrival shown in the departure city's zone is morning or evening back home
- Coordinate a live product launch across teams on three continents without miscalculating DST
- Plan a call with a remote client by entering their local time and seeing your equivalent
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