시간대 변환기

Select two cities from our database and instantly see the current time in both locations, the hour difference, and a visual work hour overlap chart. Our converter uses IANA timezone data and accounts for Daylight Saving Time changes.

Yes. Our converter uses the Intl.DateTimeFormat API which automatically accounts for Daylight Saving Time transitions. The time difference shown is always accurate for the current date.

The work hour overlap chart shows how much of the standard 9 AM to 5 PM work day overlaps between two cities. This is essential for remote teams and digital nomads who need to schedule meetings across timezones.

We use IANA timezone identifiers (e.g., Asia/Seoul, America/New_York) for all 50+ cities in our database. This is the same standard used by operating systems and programming languages worldwide.

Yes, our timezone converter is 100% free to use. No sign-up required. Compare as many city timezones as you like.