What is the time difference between Tokyo and Tehran?

Tehran is 5 hours 30 minutes behind Tokyo. 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 Tehran from Tokyo?

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

Does Tokyo observe daylight saving time?

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

Does Tehran observe daylight saving time?

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

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

It is 06:30 in Tehran, 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 Tokyo and Tehran use?

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

Convert Tokyo time to Tehran time

Tehran is 5 hours 30 minutes behind Tokyo right now, so midday in Tokyo lands in the morning in Tehran.

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 Tokyo, across for Tehran.

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

Daylight saving time

Both cities keep one offset all year. Whatever difference holds today still holds in six months.

Tokyo

Does not observe daylight saving time

Standard: UTC+9

Tehran

Does not observe daylight saving time

Standard: UTC+3:30

When you can actually talk

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

Tokyo 14:30–18:00Tehran 09:00–12:30

Reference

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

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

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

Common questions

What is the time difference between Tokyo and Tehran?: Tehran is 5 hours 30 minutes behind Tokyo. 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 Tehran from Tokyo?: Between 14:30–18:00 in Tokyo, which is 09:00–12:30 in Tehran. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
Does Tehran observe daylight saving time?: No. Tehran stays on UTC+3:30 all year, so its clocks never move.
If it is midday in Tokyo, what time is it in Tehran?: It is 06:30 in Tehran, 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 Tokyo and Tehran use?: Tokyo uses Asia/Tokyo, currently UTC+9, and Tehran uses Asia/Tehran, currently UTC+3:30. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.