CET to JST Time Converter
JST is 7 hours ahead of CET. Continental western Europe is currently on CEST (UTC+2:00), and JST is UTC+9:00.
Best Time to Call Between CET and JST
Both zones are inside normal business hours between 9:00 AM and 10:00 AM CET — that's 4:00 PM to 5:00 PM JST. That's a 1-hour window.
both at work CET only JST only neither — hours along the strip are CET.
Common Times Converted
CET on the left, JST on the right.
CET to JST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| CET | JST | Working hours |
|---|---|---|
| 12:00 AM | 7:00 AM | — |
| 1:00 AM | 8:00 AM | — |
| 2:00 AM | 9:00 AM | JST only |
| 3:00 AM | 10:00 AM | JST only |
| 4:00 AM | 11:00 AM | JST only |
| 5:00 AM | 12:00 PM | JST only |
| 6:00 AM | 1:00 PM | JST only |
| 7:00 AM | 2:00 PM | JST only |
| 8:00 AM | 3:00 PM | JST only |
| 9:00 AM | 4:00 PM | Both zones |
| 10:00 AM | 5:00 PM | CET only |
| 11:00 AM | 6:00 PM | CET only |
| 12:00 PM | 7:00 PM | CET only |
| 1:00 PM | 8:00 PM | CET only |
| 2:00 PM | 9:00 PM | CET only |
| 3:00 PM | 10:00 PM | CET only |
| 4:00 PM | 11:00 PM | CET only |
| 5:00 PM | 12:00 AM next day | — |
| 6:00 PM | 1:00 AM next day | — |
| 7:00 PM | 2:00 AM next day | — |
| 8:00 PM | 3:00 AM next day | — |
| 9:00 PM | 4:00 AM next day | — |
| 10:00 PM | 5:00 AM next day | — |
| 11:00 PM | 6:00 AM next day | — |
What CET and JST Actually Are
CET — Central European Time
Paris, Berlin, Madrid, Rome, Amsterdam, Vienna, Warsaw, Stockholm. Standing at UTC+1:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to CET. Most of continental Europe moves to CEST (UTC+2) for the summer.
Central European Time spans a remarkable stretch of longitude — from Spain's Atlantic coast to Poland's eastern border — so solar noon in Madrid arrives nearly two hours later than in Warsaw.
JST — Japan Standard Time
Tokyo, Osaka, Yokohama, Nagoya, Sapporo. Standing at UTC+9:00 as written, and the region does not change its clocks, so that offset holds all year. Japan does not observe daylight saving, so this offset is fixed year-round.
Japan abolished daylight saving in 1952 and has resisted every attempt to reintroduce it, including a proposal around the 2020 Olympics.
What This Means in Practice
This gap is not fixed
CET changes its clocks and JST does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, October 25, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on CET
Cities on JST
Frequently Asked Questions
What is the time difference between CET and JST?
JST is 7 hours ahead of CET. That is the live figure. Taken strictly as written, the gap between CET and JST is 8 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM CET in JST?
9:00 AM CET is 4:00 PM JST.
What are the best hours to schedule a call between CET and JST?
Between 9:00 AM and 10:00 AM CET, which is 4:00 PM to 5:00 PM JST. Both sides are inside normal business hours through that window.
Does the difference between CET and JST change during the year?
Yes. CET observes daylight saving and JST does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does CET always mean Central European Time?
Most of continental Europe moves to CEST (UTC+2) for the summer.
Does JST always mean Japan Standard Time?
Japan does not observe daylight saving, so this offset is fixed year-round.