What is the time difference between Tehran and Tokyo?

Tokyo is 5 hours 30 minutes ahead of Tehran. 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 Tehran?

Between 09:00–12:30 in Tehran, which is 14:30–18:00 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Tehran observe daylight saving time?

No. Tehran stays on UTC+3:30 all year, so its clocks never move.

Does Tokyo observe daylight saving time?

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

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

It is 17:30 in Tokyo, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.

Which time zones do Tehran and Tokyo use?

Tehran uses Asia/Tehran, currently UTC+3:30, and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Tehran time to Tokyo time

Tokyo is 5 hours 30 minutes ahead of Tehran right now, so midday in Tehran lands in the afternoon in Tokyo.

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

Every hour of a day in Tehran, and what the clock reads in Tokyo at that same moment.

Tehran	Tokyo
00:00	05:30
01:00	06:30
02:00	07:30
03:00	08:30
04:00	09:30
05:00	10:30
06:00	11:30
07:00	12:30
08:00	13:30
09:00	14:30
10:00	15:30
11:00	16:30
12:00	17:30
13:00	18:30
14:00	19:30
15:00	20:30
16:00	21:30
17:00	22:30
18:00	23:30
19:00	00:30next day
20:00	01:30next day
21:00	02:30next day
22:00	03:30next day
23:00	04:30next day

Daylight saving time

Neither Tehran nor Tokyo changes its clocks, so the difference between them is the same every day of the year.

Tehran

Does not observe daylight saving time

Standard: UTC+3:30

Tokyo

Does not observe daylight saving time

Standard: UTC+9

When you can actually talk

The window is 3 hours 30 minutes wide — 09:00–12:30 in Tehran, 14:30–18:00 in Tokyo.

Tehran 09:00–12:30Tokyo 14:30–18:00

Reference

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

	Tehran	Tokyo
IANA zone	Asia/Tehran	Asia/Tokyo
Abbreviation	UTC+3:30	UTC+9
Standard offset	UTC+3:30	UTC+9
Daylight offset	—	—
Clock changes this year	0	0
Country	Iran	Japan

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

Common questions

What is the time difference between Tehran and Tokyo?: Tokyo is 5 hours 30 minutes ahead of Tehran. 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 Tehran?: Between 09:00–12:30 in Tehran, which is 14:30–18:00 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Tehran observe daylight saving time?: No. Tehran stays on UTC+3:30 all year, so its clocks never move.
Does Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
If it is midday in Tehran, what time is it in Tokyo?: It is 17:30 in Tokyo, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.
Which time zones do Tehran and Tokyo use?: Tehran uses Asia/Tehran, currently UTC+3:30, and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.