liminfo

Timezone Converter

Free web tool: Timezone Converter

Seoul (KST) Current Time

02/25/2026, 11:00:20

New York (EST/EDT) Current Time

02/24/2026, 21:00:20

Time Conversion

About Timezone Converter

The Timezone Converter lets you instantly convert a date and time between any two of 20 major world timezones — from Seoul (KST) and Tokyo (JST) to New York (EST/EDT), London (GMT/BST), Dubai (GST), Sydney (AEST), and beyond. The tool displays live-updating current times in both the source and target timezone simultaneously, so you always see the present moment in context before performing your conversion.

Remote teams, international travelers, and anyone coordinating across borders rely on accurate timezone conversion daily. Scheduling a video call between Seoul and Los Angeles, figuring out when a US market opens in European time, or confirming a flight arrival in local time are all common scenarios this tool handles in seconds. The swap button lets you reverse the direction of conversion without re-entering data.

Technically, the converter uses the JavaScript Intl.DateTimeFormat API with IANA timezone identifiers (e.g., America/New_York, Asia/Seoul) to correctly resolve daylight saving time transitions for each zone. All computation happens in your browser — there are no server round-trips, no cookies, and no data collection. The real-time clock refreshes every second using setInterval so you always see the current time in both zones.

Key Features

  • 20 major world timezones covering Asia, Europe, Americas, Pacific, and UTC
  • Live-updating current time display for both source and target timezones
  • Date-and-time picker for converting any specific moment — past or future
  • One-click swap button to reverse the conversion direction instantly
  • Correct daylight saving time handling via IANA timezone database
  • Bilingual Korean/English interface with locale-aware date formatting
  • 100% browser-side computation — no network requests, no data sent to servers
  • Responsive layout with dark mode support for desktop, tablet, and mobile

Frequently Asked Questions

How does this timezone converter handle daylight saving time?

The converter uses IANA timezone identifiers (e.g., America/New_York, Europe/London) through the JavaScript Intl.DateTimeFormat API, which automatically applies the correct DST offset for the exact date and time you enter. You do not need to manually account for summer or winter time.

Which timezones are supported?

The tool supports 20 major timezones: Seoul (KST), Tokyo (JST), Beijing (CST), Singapore (SGT), Bangkok (ICT), Mumbai (IST), Dubai (GST), Moscow (MSK), Istanbul (TRT), London (GMT/BST), Paris (CET/CEST), Berlin (CET/CEST), New York (EST/EDT), Chicago (CST/CDT), Denver (MST/MDT), Los Angeles (PST/PDT), Hawaii (HST), Sydney (AEST), Auckland (NZST), and UTC.

Can I convert times in the past or future?

Yes. Use the date-and-time picker to enter any past or future date and time in the source timezone. The converter will display the corresponding time in your chosen target timezone, including correct DST adjustments for that specific date.

What is the difference between GMT and UTC?

GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) share the same zero offset but are defined differently. UTC is based on atomic clocks and is the modern standard for timekeeping, while GMT is a geographic timezone. For practical conversion purposes they are equivalent and both show +00:00.

Why does the current time update every second?

The tool uses a 1-second setInterval timer to keep the live time display accurate. This ensures you always see the real current time in both timezones, which is especially useful when monitoring a time zone offset before placing an international call.

How do I convert time from Seoul to New York?

Select "Seoul (KST)" as the source timezone and "New York (EST/EDT)" as the target, then use the date-and-time picker to set the Seoul time you want to convert. The result will appear instantly in the conversion result box, showing the New York equivalent with correct DST applied.

Is there a time difference between South Korea and Japan?

No. South Korea (KST, UTC+9) and Japan (JST, UTC+9) share the same UTC offset, so the time is identical in both countries at any given moment. Both zones use Asia/Seoul and Asia/Tokyo IANA identifiers, which produce the same wall-clock reading.

Is this tool free and does it require an account?

Yes, the Timezone Converter is completely free with no account required. All processing happens in your browser using standard web APIs, so there is nothing to install and no personal data is collected or stored.