What is the time difference between Prague and Tokyo?

Tokyo is 7 hours ahead of Prague. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Tokyo from Prague?

Between 09:00–11:00 in Prague, which is 16:00–18:00 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Prague observe daylight saving time?

Yes. Prague runs on UTC+1 in winter and UTC+2 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.

Does Tokyo observe daylight saving time?

No. Tokyo stays on UTC+9 all year, so its clocks never move.

If it is midday in Prague, what time is it in Tokyo?

It is 19:00 in Tokyo, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Prague and Tokyo use?

Prague uses Europe/Prague, currently UTC+2 (CEST), and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Prague time to Tokyo time

Right now Tokyo runs 7 hours ahead of Prague. That gap is not fixed: it moves when either city changes its clocks.

Convert a time

From

Date

Time

Converted time

—

The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

The whole day mapped across: read down the left for Prague, across for Tokyo.

Prague	Tokyo
00:00	07:00
01:00	08:00
02:00	09:00
03:00	10:00
04:00	11:00
05:00	12:00
06:00	13:00
07:00	14:00
08:00	15:00
09:00	16:00
10:00	17:00
11:00	18:00
12:00	19:00
13:00	20:00
14:00	21:00
15:00	22:00
16:00	23:00
17:00	00:00next day
18:00	01:00next day
19:00	02:00next day
20:00	03:00next day
21:00	04:00next day
22:00	05:00next day
23:00	06:00next day

Daylight saving time

Prague changes its clocks; Tokyo does not. The difference between them therefore shifts by an hour twice a year.

Prague

Observes daylight saving time

Standard: UTC+1
Daylight: UTC+2
Next change: 2026-10-25 −60m

Tokyo

Does not observe daylight saving time

Standard: UTC+9

When you can actually talk

The window is 2 hours wide — 09:00–11:00 in Prague, 16:00–18:00 in Tokyo.

Prague 09:00–11:00Tokyo 16:00–18:00

Reference

The underlying data, in case you need to put it in a calendar invitation or a configuration file.

	Prague	Tokyo
IANA zone	Europe/Prague	Asia/Tokyo
Abbreviation	CEST	UTC+9
Standard offset	UTC+1	UTC+9
Daylight offset	UTC+2	—
Clock changes this year	2	0
Country	Czechia	Japan

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Prague and Tokyo?: Tokyo is 7 hours ahead of Prague. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call Tokyo from Prague?: Between 09:00–11:00 in Prague, which is 16:00–18:00 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Prague observe daylight saving time?: Yes. Prague runs on UTC+1 in winter and UTC+2 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.
Does Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
If it is midday in Prague, what time is it in Tokyo?: It is 19:00 in Tokyo, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do Prague and Tokyo use?: Prague uses Europe/Prague, currently UTC+2 (CEST), and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.