Timezone Converter
Convert time between major world timezones including UTC, US, Europe, and Asia.
Input Information
Result
<strong>Timezone Converter</strong> is an essential tool that provides time conversions between major timezones around the world. It supports UTC, US Eastern/Pacific, Europe London, and Asia Tokyo/Seoul/Shanghai timezones. Enter a date and time to instantly see conversion results for other timezones.
It is useful when time zone conversion is needed for international business meetings, overseas travel, remote work, online gaming, and more. It is an indispensable tool for coordinating meeting times with team members scattered across multiple countries.
This converter performs accurate conversions based on the UTC offset of each timezone. After selecting a timezone, enter a date and time to see the corresponding time in all selected timezones simultaneously, allowing you to quickly identify which timezone is appropriate.
This tool is based on standard timezone offsets. Daylight Saving Time (DST) is not automatically applied and must be manually adjusted if needed.
Term Glossary
- UTC
- Coordinated Universal Time, the international standard time based on longitude 0 degrees (near London). Each timezone is expressed as an offset from UTC (e.g., KST = UTC+9).
- Daylight Saving Time (DST)
- A system that advances clocks by 1 hour during summer, typically applied from March to November in the US and Europe. Korea and Japan do not implement DST, and this converter does not automatically apply it.
- UTC Offset
- A value indicating how many hours ahead or behind a specific timezone is compared to UTC. Time is converted by adding or subtracting the offset difference.
- Select timezone A.
- Select timezone B.
- Enter the time you want to convert.
- See the converted time shown in both time zones.
KST → UTC
9:00 KST (UTC+9) is 0:00 UTC.
EST → KST
14:00 EST (UTC-5) is 4:00 KST the next day.
Timezone Conversion Formula
Converting UTC 10:00 to other timezones:
Seoul (UTC+9): 19:00, New York (UTC-5): 05:00, London (UTC+0): 10:00
Core Concepts
Daylight Saving Time (DST): Many countries advance clocks by 1 hour during summer (US/Europe: March~November). Korea and Japan do not observe DST.
International meeting times are usually set based on UTC.
Application Cases
- International Business: Coordinating meeting times across multiple timezones
- Travel: Checking time differences between departure and destination in advance
- Finance: Checking trading hours for New York, London, Tokyo stock exchanges
- Online Gaming: Confirming global server event times
QAre UTC and GMT the same?
UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) refer to nearly the same base time zone. However, GMT is a traditional term based on astronomical observation, while UTC is the modern standard based on atomic clocks.
QHow is daylight saving time (DST) handled?
Some regions shift their clocks forward in summer for DST. This tool reflects the current DST status of the selected time zones, so results may change depending on the season.
QWhat is the difference between a UTC offset and an actual time zone?
A UTC offset is simply the time difference from UTC and does not account for DST. An actual time zone (e.g., KST, EST) defines complete rules, including standard time and DST changes for a region.
QHow do I schedule meetings across time zones?
First compare the time zone offsets to find the difference, then look for a window where both regions' working hours (typically 9 AM to 6 PM) overlap. Use this tool to convert a time in one region to the other.
QWhy do some time zones have 30-minute offsets?
Some countries use 30-minute or 45-minute offsets for political or geographical reasons rather than whole hours. For example, India (IST) is UTC+5:30 and Nepal is UTC+5:45.