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.

WAT to IRST

+2h 30m

WAT

WATSOURCE

UTC+01:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

IRST

UTC+03:30

HH02

MM30

14:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

WAT

IRST

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

Time Conversion Guide: WAT to IRST

WAT runs on West Africa Time (WAT) at UTC+01:00. IRST runs on Iran Standard Time (IRST) at UTC+03:30. That puts WAT 2 hours 30 minutes ahead of IRST — 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 IRST. Midnight in WAT is 2:30 AM in IRST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

WAT to IRST time conversion table

WAT (WAT)	IRST (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 IRST time

Scheduling a call from WAT to IRST: a 10:00 AM start in WAT lands at 12:30 PM in IRST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both WAT and IRST 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 IRST 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 IRST 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 IRST

Both WAT and IRST 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 IRST 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 IRST (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 IRST?

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

How do I convert WAT time to IRST time?

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

What time is it in IRST right now?

IRST 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.