Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

WAT to Iran

+2h 30m

WAT

WATSOURCE

UTC+01:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Iran

IRST

UTC+03:30

HH02

MM30

14:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

WAT

Iran

12:00 AM

2:30 AM

2:00 AM

4:30 AM

4:00 AM

6:30 AM

6:00 AM

8:30 AM

8:00 AM

10:30 AM

10:00 AM

12:30 PM

12:00 PM

2:30 PM

2:00 PM

4:30 PM

4:00 PM

6:30 PM

6:00 PM

8:30 PM

8:00 PM

10:30 PM

10:00 PM

12:30 AM+1

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

WAT and IRST on the World Map

The map below highlights the WAT (West Africa Time) and IRST (Iran Standard Time) timezone regions across the globe.

WAT Zone

→

IRST Zone

Explore all world timezones interactively →

WAT – West Africa Time

UTC+01:00

West Africa Time (WAT) is the time zone for West and Central Africa, 1 hour ahead of UTC.

Countries in WAT

NigeriaCameroonChadCongoAngolaNigerGabonEquatorial Guinea

Major Cities in WAT

LagosAbujaDoualaYaoundéLuandaKinshasaBrazzaville

Key Facts about WAT

•Lagos, Nigeria is the most populous city in Africa.
•WAT is the same offset as CET (UTC+01:00).
•Nigeria does not observe daylight saving time.

Daylight Saving:No – UTC+01:00 year-round

Learn more about WAT on Wikipedia

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

WAT vs Iran: Offsets, DST and Best Call Times

WAT runs on West Africa Time (WAT) at UTC+01:00. Iran runs on Iran Standard Time (IRST) at UTC+03:30. That puts WAT 2 hours 30 minutes ahead of Iran — a difference of +2h 30m at the current offsets.

In practice, when it is 9:00 AM in WAT it is 11:30 AM in Iran. Midnight in WAT is 2:30 AM in Iran. Neither zone observes daylight saving time, so the offset between them stays constant all year.

WAT to Iran time conversion table

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

Why people convert WAT to Iran time

Scheduling a call from WAT to Iran: a 10:00 AM start in WAT lands at 12:30 PM in Iran, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both WAT and Iran are inside the 9-to-5 working day between 9:00 AM and 2:30 PM WAT time (11:30 AM–5:00 PM IRST). That is roughly 5 hours 30 minutes of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in WAT is 10:30 PM in Iran makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM WAT" is unambiguous; "3 PM" across a +2h 30m gap is not.
Block 9:00 AM–2:30 PM WAT as the recurring meeting window if you work primarily from WAT and need Iran colleagues present.

About WAT (West Africa Time)

West Africa Time (WAT) is used across much of West and Central Africa, including Nigeria, the most populous country in Africa. WAT does not observe daylight saving time and shares the same offset as Central European Time (CET).

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.

Best time to call between WAT and Iran

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

Business hours overlap

WAT and Iran share 5 hours of working-hours overlap (9:00 AM–2:30 PM WAT), so scheduling a live meeting is straightforward.

WAT is 2 hours 30 minutes ahead of Iran (WAT UTC+01:00 → IRST UTC+03:30). The shared working window is 9:00 AM–2:30 PM WAT. 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 WAT and Iran?

WAT (WAT, UTC+01:00) is 2 hours 30 minutes ahead of Iran (IRST, UTC+03:30). The gap is currently +2h 30m.

How do I convert WAT time to Iran time?

Add +2h 30m to WAT local time. For example, 9:00 AM in WAT is 11:30 AM in Iran.

What time is it in Iran right now?

Iran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h 30m offset from WAT.