How many hours is Tokyo ahead of Copenhagen?

Tokyo (JST, UTC+9) is 8 hours ahead of Copenhagen during Central European Time (CET, UTC+1) in winter, and 7 hours ahead during Central European Summer Time (CEST, UTC+2) in summer. Denmark observes DST; Japan does not.

Does Japan observe Daylight Saving Time?

No. Japan abolished Daylight Saving Time in 1952. JST is always UTC+9 year-round with no seasonal clock changes.

When does Copenhagen switch between CET and CEST?

Denmark moves clocks forward one hour on the last Sunday of March (to CEST, UTC+2) and back one hour on the last Sunday of October (to CET, UTC+1).

What are the business-hours overlap between Tokyo and Copenhagen?

Tokyo business hours are roughly 09:00–18:00 JST. In winter, that corresponds to 01:00–10:00 CET in Copenhagen — almost no overlap during normal hours. In summer it is 02:00–11:00 CEST. Effective overlap requires one side to work early morning or late evening.

Is the clock accurate?

Yes, as long as your device clock is synchronized. Most modern devices sync automatically via NTP. The timezone conversions use the IANA database built into your browser.

What is the time difference when Tokyo is at noon?

When it is 12:00 noon in Tokyo, it is 04:00 CET in Copenhagen in winter (UTC+1) or 05:00 CEST in Copenhagen in summer (UTC+2).

Time Difference: Tokyo to Copenhagen

Name: Time Difference: Tokyo to Copenhagen
Availability: InStock
Author: Nham Vu

See the current time in Tokyo (JST, UTC+9) and Copenhagen (CET/CEST) side by side with the live hour offset and business-hours overlap indicator.

Tokyo, Japan

JST • UTC+9

--:--:--

Copenhagen, Denmark

CET • UTC+1

--:--:--

Current Offset

-- hours — Tokyo is ahead of Copenhagen

Business Hours Overlap

Standard business hours: Tokyo 09:00–18:00 JST | Copenhagen 09:00–17:00 local

Quick Time Converter

Tokyo time (24 h)

Minute

Summary

See the current time in Tokyo (JST, UTC+9) and Copenhagen (CET/CEST) side by side with the live hour offset and business-hours overlap indicator.

How it works

Your device clock is read via the JavaScript Date API.
Tokyo time is computed using the IANA timezone identifier Asia/Tokyo (always UTC+9).
Copenhagen time is computed using Europe/Copenhagen, which switches between CET (UTC+1) in winter and CEST (UTC+2) in summer.
The offset is calculated by comparing the UTC offsets of the two timezones at the current moment.
The display updates every second so both clocks stay live and accurate.
A business-hours overlap indicator shows when both cities share working hours on the same day.

Use cases

Scheduling video calls between colleagues in Tokyo and Copenhagen.
Checking whether both cities are in business hours at the same time.
Planning Japan-Denmark travel connections and layovers.
Tracking live events or broadcasts originating from either city.
Remote teams coordinating across JST and CET/CEST time zones.
Investors monitoring both the Tokyo Stock Exchange and Copenhagen Stock Exchange.
Students or journalists following live news from Tokyo or Copenhagen.
Understanding how Denmark's DST shift changes the Tokyo-Copenhagen gap each spring and autumn.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu