What is the time difference between IRST and WAT?

West Africa Time (WAT) is 2 hours and 30 minutes behind Iran Standard Time (IRST). IRST uses a UTC offset of UTC+3:30, while WAT uses UTC+1. For example, when it's 9:00 AM in IRST, it's 6:30 AM in WAT. This difference remains constant year-round since neither timezone observes daylight saving time. Use the conversion table above to see the exact time for each hour of the day.

How do I convert IRST to WAT?

To convert IRST to WAT, subtract 2 hours and 30 minutes from the IRST time. For example, 9:00 AM IRST is 6:30 AM WAT, and 5:00 PM IRST is 2:30 PM WAT. Since neither timezone observes DST, this conversion stays the same all year. You can also use the interactive converter above for quick, accurate results.

What time is it in WAT when it's noon in IRST?

When it's 12:00 PM (noon) in IRST, it's 9:30 AM in WAT. This is because WAT is 2 hours and 30 minutes behind IRST. Similarly, when it's 6:00 PM in IRST, it's 3:30 PM in WAT. This relationship is constant throughout the year. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours behind is WAT from IRST?

WAT is 2 hours and 30 minutes behind IRST. This means when it's 9:00 AM in IRST, it's 6:30 AM in WAT, and when it's midnight in IRST, it's 9:30 PM in WAT. This offset is constant throughout the year since neither timezone uses daylight saving time. The conversion table above provides a complete hour-by-hour mapping.

Is WAT ahead or behind IRST?

WAT is behind IRST by 2 hours and 30 minutes. Clocks in WAT show an earlier time than IRST, meaning the day starts later in WAT relative to IRST. For example, when it's noon in IRST, it's still 9:30 AM in WAT. This difference stays the same year-round.

Does IRST observe daylight saving time?

No, Iran Standard Time does not observe daylight saving time. The UTC offset of UTC+3:30 remains the same year-round, which simplifies time conversions. Regions using IRST keep their clocks unchanged regardless of the season.

Does WAT observe daylight saving time?

No, West Africa Time does not observe daylight saving time. The UTC offset of UTC+1 remains the same year-round, making time conversions to WAT more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

What is the best time to call from IRST to WAT?

The best time for a call between IRST and WAT is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in WAT during their work day, call between 11:30 AM and 7:30 PM your IRST time. Avoid calling too early or late, as the 2 hours and 30 minutes difference means your evening could be their early morning. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

Do IRST and WAT ever have the same time?

No, IRST and WAT are always 2 hours and 30 minutes apart and never display the same clock time simultaneously. Neither timezone observes DST, so the difference is constant year-round with no seasonal variation. The 2 hours and 30 minutes offset is determined by their fixed positions relative to the Prime Meridian (UTC). You can always rely on this consistent difference when planning across these timezones.

IRST to WAT Converter

Convert Iran Standard Time to West Africa Time. See the hour-by-hour conversion table below.

Timezone Details

Tehran

10:23 AM

Saturday, April 4, 2026

Tehran (UTC+03:30)

West Africa Time

7:53 AM

Saturday, April 4, 2026

WAT (UTC+01:00)

Difference: -2h 30m

WAT DST: No

24-Hour Overview

Tehran — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

WAT — 24-hour overview

9p9p

10p

11p

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

WAT to IRST

Cities in These Timezones

IRST Cities

Tehran

WAT Cities

Lagos Abuja

More Tools

Compare IRST & WAT Plan a Meeting (IRST & WAT)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

West Africa Time on Wikipedia IANA Time Zone Database