Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Iran to Tokyo

+5h 30m

Iran

IRSTSOURCE

UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tokyo

JST

Japan · UTC+09:00

HH05

MM30

17:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Iran

Tokyo

12:00 AM

5:30 AM

2:00 AM

7:30 AM

4:00 AM

9:30 AM

6:00 AM

11:30 AM

8:00 AM

1:30 PM

10:00 AM

3:30 PM

12:00 PM

5:30 PM

2:00 PM

7:30 PM

4:00 PM

9:30 PM

6:00 PM

11:30 PM

8:00 PM

1:30 AM+1

10:00 PM

3:30 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

IRST and JST on the World Map

The map below highlights the IRST (Iran Standard Time) and JST (Japan Standard Time) timezone regions across the globe.

IRST Zone

→

JST Zone

Explore all world timezones interactively →

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

JST – Japan Standard Time

UTC+09:00

Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.

Countries in JST

Japan

Major Cities in JST

TokyoOsakaYokohamaNagoyaSapporoKyotoKobeFukuokaHiroshima

Key Facts about JST

•Japan does not observe daylight saving time.
•Tokyo is the most populous metropolitan area in the world.
•The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
•JST is 14 hours ahead of EST and 9 hours ahead of GMT.

Daylight Saving:No – UTC+09:00 year-round

Learn more about JST on Wikipedia

About Tokyo

Wikipedia

Tokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.

Population:14 million

Metro:37.4 million

Business Hours:9:00 AM - 6:00 PM JST

Currency:JPY (¥)

Stock Exchange:TSE (Tokyo Stock Exchange)

Key Landmarks

Tokyo TowerShibuya CrossingSenso-ji TempleImperial PalaceTokyo Skytree

Did You Know?

The Tokyo subway system moves approximately 8.7 million passengers daily.

Learn more about JST timezone →

Time Conversion Guide: Iran to Tokyo

Iran runs on Iran Standard Time (IRST) at UTC+03:30. Tokyo runs on Japan Standard Time (JST) at UTC+09:00. That puts Iran 5 hours 30 minutes ahead of Tokyo — a difference of +5h 30m at the current offsets.

In practice, when it is 9:00 AM in Iran it is 2:30 PM in Tokyo. Midnight in Iran is 5:30 AM in Tokyo. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Iran to Tokyo time conversion table

Iran (IRST)	Tokyo (JST)	Day
12:00 AM	5:30 AM	same day
6:00 AM	11:30 AM	same day
7:00 AM	12:30 PM	same day
8:00 AM	1:30 PM	same day
9:00 AM	2:30 PM	same day
12:00 PM	5:30 PM	same day
3:00 PM	8:30 PM	same day
5:00 PM	10:30 PM	same day
6:00 PM	11:30 PM	same day
9:00 PM	2:30 AM	next day

Why people convert Iran to Tokyo time

Scheduling a call from Iran to Tokyo: a 10:00 AM start in Iran lands at 3:30 PM in Tokyo, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Iran and Tokyo are inside the 9-to-5 working day between 9:00 AM and 11:30 AM IRST time (2:30 PM–5:00 PM JST). That is roughly 2 hours 30 minutes of usable overlap.
Booking travel or deliveries: tracking Tokyo local time against Iran keeps pickup windows and arrival estimates honest across the +5h 30m offset.

Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a +5h 30m gap is not.
Block 9:00 AM–11:30 AM IRST as the recurring meeting window if you work primarily from Iran and need Tokyo colleagues present.

About IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

About JST (Japan Standard Time)

Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.

Best time to call between Iran and Tokyo

Both Iran and Tokyo sit inside the 9 AM – 5 PM working day between 9:00 AM–11:30 AM IRST, which is 2:30 PM–5:00 PM JST. That gives roughly 2 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Iran and Tokyo overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.

Iran is 5 hours 30 minutes ahead of Tokyo (IRST UTC+03:30 → JST UTC+09:00). The shared working window is 9:00 AM–11:30 AM IRST. Remember to re-check around daylight-saving transitions.

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Iran and Tokyo?

Iran (IRST, UTC+03:30) is 5 hours 30 minutes ahead of Tokyo (JST, UTC+09:00). The gap is currently +5h 30m.

How do I convert Iran time to Tokyo time?

Add +5h 30m to Iran local time. For example, 9:00 AM in Iran is 2:30 PM in Tokyo.

What time is it in Tokyo right now?

Tokyo uses JST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +5h 30m offset from Iran.

What is the best time to call Tokyo from Iran?

Call between 9:00 AM and 11:30 AM IRST — that maps to 2:30 PM–5:00 PM JST and keeps both parties inside the working day.

Which is ahead, Iran or Tokyo?

Iran is 5 hours 30 minutes ahead of Tokyo. When it is 12:00 PM in Iran it is 5:30 PM in Tokyo.

Do Iran and Tokyo use different time zones?

Iran (Iran) uses IRST at UTC+03:30, while Tokyo (Japan) uses JST at UTC+09:00. The IANA identifiers are Asia/Tehran and Asia/Tokyo.

Does daylight saving time affect the Iran–Tokyo difference?

Neither zone observes daylight saving time, so the +5h 30m offset between Iran and Tokyo is fixed all year.

Which other cities share Iran's time zone?

IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.

Which countries use IRST, Iran's zone?

IRST is used in Iran.

Is there a day difference between Iran and Tokyo?

Not normally. The +5h 30m gap only pushes the date over for late-evening times.

What is the time difference between Iran and Tokyo?

Tokyo is +5h 30m from Iran.

What timezone is Iran in?

Iran operates on its local timezone.

What timezone is Tokyo in?

Tokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.