CET to JST Converter

Category: Time Zone Converters

- June 28, 2025

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Central European Time (CET)

UTC+1 • Berlin, Paris, Rome

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Show Seconds

Japan Standard Time (JST)

UTC+9 • Tokyo, Osaka, Yokohama

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (CET): +01:00

UTC Offset (JST): +09:00

DST Status: --

CET Time: --

JST Time: --

Time Format:

Current CET: --:--:--

Current JST: --:--:--

🌍 CET is UTC+1 (UTC+2 during CEST) and JST is always UTC+9. Japan never observes daylight saving time, maintaining consistent timing year-round.

CET to JST Conversion Guide

What is CET to JST Conversion?

CET to JST conversion helps you translate time between Central European Time and Japan Standard Time zones. CET is UTC+1 during standard time (winter) and becomes CEST (UTC+2) during daylight saving time. JST is always UTC+9 and never changes for daylight saving time. The time difference varies between 7-8 hours depending on whether Europe is observing daylight saving time.

Time Zone Information

Central European Time (CET): Used in most of Europe including Germany, France, Italy, Spain, and Poland. UTC+1 in winter, UTC+2 (CEST) in summer with daylight saving time.

Japan Standard Time (JST): Used throughout Japan including Tokyo, Osaka, Yokohama, and Sapporo. Always UTC+9 with no daylight saving time adjustments ever implemented.

Time Difference: JST is 8 hours ahead of CET during standard time, and 7 hours ahead of CEST during daylight saving time.

Daylight Saving Time Impact

Europe (CET): Observes daylight saving time from last Sunday in March to last Sunday in October (CEST, UTC+2)

Japan (JST): Never observes daylight saving time and remains on UTC+9 throughout the year

Variable Difference: The time difference changes from 8 hours (CET to JST) to 7 hours (CEST to JST) during European summer time

Common Conversion Examples

Winter Business Hours

CET 9:00 AM → JST 5:00 PM

CET 5:00 PM → JST 1:00 AM+1

8-hour difference (CET period)

Summer Business Hours

CEST 9:00 AM → JST 4:00 PM

CEST 5:00 PM → JST 12:00 AM+1

7-hour difference (CEST period)

Meeting Planning

Best CET Time: 9:00 AM - 10:00 AM

Converts to JST: 5:00 PM - 6:00 PM

Good business hours overlap

Event Scheduling

CET Midnight: 8:00 AM JST

CET Noon: 8:00 PM JST

During standard time period

Conversion Tips & Best Practices

• During CET (winter): Add 8 hours to CET to get JST time

• During CEST (summer): Add 7 hours to CEST to get JST time

• Japan has never implemented daylight saving time, maintaining consistent UTC+9 year-round

• Business communication works best during European morning hours (9-10 AM CET/CEST)

• Major European cities in CET: Berlin, Paris, Rome, Madrid, Warsaw, Vienna

• Major Japanese cities in JST: Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Fukuoka

Convert Between CET and JST

Trying to figure out what time it is in Tokyo when you’re in Berlin, Paris, or Rome? This time conversion calculator is built to take the guesswork out of switching between Central European Time (CET) and Japan Standard Time (JST). Whether you're planning a call with colleagues across continents or checking broadcast times for international events, this tool does the heavy lifting so you don’t have to.

What This Calculator Actually Does

At its core, this tool lets you pick a date and time in either CET or JST and immediately see what that translates to in the other zone. It takes into account whether Europe is in daylight saving mode (CEST) and whether you want to view time in 12-hour or 24-hour format. It even tells you how many hours apart the zones are, based on the time of year.

Who Would Use This and Why?

If you’ve ever found yourself googling “What time is 9 AM in Berlin in Tokyo?” this tool is for you. It’s especially useful for:

International business meetings
Coordinating virtual events
Remote team check-ins across time zones
Scheduling travel or livestreams

For example, if you're based in Paris and need to join a video call with a team in Tokyo at 6 PM their time, just pop that into the converter, swap the input to JST, and you’ll instantly see it’s 10 AM your time (during summer). No manual calculations, no mistakes.

How to Use It Without Missing a Beat

1. Pick Your Input Time Zone

By default, the tool assumes you’re starting in Central European Time. If your starting point is Japan instead, hit the “Swap” button or change the dropdown. The titles and labels will switch accordingly.

2. Set the Date and Time

Use the date and time pickers to select exactly when you want to convert. For example, if you're planning for June 15 at 3:00 PM in CET, enter that, and the tool does the rest.

3. Click "Convert Time" or Use Auto Convert

You can manually trigger the conversion or enable “Auto Convert” so the results update instantly when you change the inputs.

4. Read Your Result

You’ll see the equivalent time and date in the other time zone, formatted neatly and clearly. The tool also tells you the time difference, the current UTC offsets for both zones, and whether daylight saving time is in play.

Extra Features That Make a Difference

Live Clocks

At the bottom of the calculator, you’ll always see the current time in both CET and JST. Handy if you’re trying to make a quick decision.

Switch Time Formats

Prefer 24-hour time? Or maybe you like AM/PM style? Tap the “12 Hour” button to toggle formats anytime.

Daylight Saving Awareness

The calculator knows when Europe switches to summer time (last Sunday of March) and back again (last Sunday of October). It adjusts the difference between CET and JST accordingly, so you don’t have to keep track.

Control the Details

You can decide whether or not to show seconds, display UTC offsets, or factor in daylight saving with simple checkboxes. These settings give you precision if you need it and simplicity if you don’t.

Answers to Common Sticking Points

Why is my time difference showing 7 hours instead of 8?

Europe is likely in daylight saving time (CEST), which makes CET temporarily UTC+2. Since Japan stays fixed at UTC+9, the gap narrows to 7 hours.

Why does the time not update when I change the input?

Auto Convert might be turned off. Either enable it with the checkbox, or hit the “Convert Time” button after entering your values.

Can I reverse the time zones?

Yes. Hit the “Swap” button to flip the input and output zones instantly. This is great if you're starting from JST instead of CET.

What happens when I hit "Now"?

The input fields populate with the current time in the selected input zone. It’s a fast way to check what “right now” looks like across the world.

A Real-World Example That Makes It Click

Say you’re in Warsaw, Poland (CET), and trying to schedule a live webinar for a Japanese audience. You want it to go live at 8:00 PM Tokyo time. Use the dropdown to set JST as your input zone, enter the date and 20:00, hit convert, and you'll see it’s 1:00 PM CET (or 12:00 PM if it's summer). Now you know when to go live without double-checking world clocks or confusing AM/PM labels.

Keep Meetings Smooth and Time Zones Straight

Time differences don’t have to be confusing. This CET-JST calculator gives you a clean, accurate way to convert, compare, and coordinate without pulling out a spreadsheet or hoping search results are right. Whether you’re syncing up with Tokyo from Munich or confirming a flight from Osaka to Paris, this tool keeps your schedule sharp and your timing spot on.