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).

Casablanca to IRST

+2h 30m

Casablanca

UTC+01:00SOURCE

Morocco · UTC+01:00DST observed

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

Casablanca

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)

UTC+01:00 and IRST on the World Map

The map below highlights the UTC+01:00 (Western European Time) and IRST (Iran Standard Time) timezone regions across the globe.

UTC+01:00 Zone

→

IRST Zone

Explore all world timezones interactively →

WET – Western European Time

UTC+00:00

Western European Time (WET) is the time zone for Portugal, Morocco, and the Canary Islands, same as UTC+00:00.

Countries in WET

PortugalSpain (Canary Islands)MoroccoWestern Sahara

Major Cities in WET

LisbonPortoCasablancaLas PalmasFunchalRabat

Key Facts about WET

•Portugal is the only mainland European country in the WET time zone.
•The Canary Islands are on WET despite being part of Spain (which uses CET).
•WET is identical to GMT and UTC+00:00.

Daylight Saving:Yes – switches to WEST

Learn more about WET 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

Comparing Time Zones: Casablanca and IRST

Casablanca runs on Western European Time (UTC+01:00) at UTC+01:00. IRST runs on Iran Standard Time (IRST) at UTC+03:30. That puts Casablanca 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 Casablanca it is 11:30 AM in IRST. Midnight in Casablanca is 2:30 AM in IRST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Casablanca to IRST time conversion table

Casablanca (UTC+01:00)	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 Casablanca to IRST time

Scheduling a call from Casablanca to IRST: a 10:00 AM start in Casablanca lands at 12:30 PM in IRST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Casablanca and IRST are inside the 9-to-5 working day between 9:00 AM and 2:30 PM UTC+01:00 time (11:30 AM–5:00 PM IRST). That is roughly 5 hours 30 minutes of usable overlap.
Watching a live event or market open: Casablanca viewers need 11:30 AM in IRST to catch a 9:00 AM start there, and 9:30 PM if the event is anchored to Casablanca.

Always state the zone abbreviation, not just the hour. "3:00 PM UTC+01:00" is unambiguous; "3 PM" across a +2h 30m gap is not.
Block 9:00 AM–2:30 PM UTC+01:00 as the recurring meeting window if you work primarily from Casablanca and need IRST colleagues present.
Casablanca: Clocks fall back on Sun, Feb 7, 2027. Re-check this page after that date because the offset changes and so does the +2h 30m gap.

About WET (Western European Time)

Western European Time (WET) is used in Portugal, the Canary Islands (Spain), Morocco, and several other locations. It is equivalent to GMT/UTC. During summer, Portugal and the Canary Islands switch to WEST (Western European Summer Time, UTC+01:00).

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 Casablanca and IRST

Both Casablanca and IRST sit inside the 9 AM – 5 PM working day between 9:00 AM–2:30 PM UTC+01:00, 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

Casablanca and IRST share 5 hours of working-hours overlap (9:00 AM–2:30 PM UTC+01:00), so scheduling a live meeting is straightforward.

Casablanca is 2 hours 30 minutes ahead of IRST (UTC+01:00 UTC+01:00 → IRST UTC+03:30). The shared working window is 9:00 AM–2:30 PM UTC+01:00. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Casablanca

❄ Currently in Standard Time

Standard: UTC+01:00 · DST: UTC+00:00

Clocks fall back on Sun, Feb 7, 2027

IRST

Does not observe DST

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 Casablanca and IRST?

Casablanca (UTC+01:00, 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 Casablanca time to IRST time?

Add +2h 30m to Casablanca local time. For example, 9:00 AM in Casablanca 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 Casablanca.

What is the best time to call IRST from Casablanca?

Call between 9:00 AM and 2:30 PM UTC+01:00 — that maps to 11:30 AM–5:00 PM IRST and keeps both parties inside the working day.

Which is ahead, Casablanca or IRST?

Casablanca is 2 hours 30 minutes ahead of IRST. When it is 12:00 PM in Casablanca it is 2:30 PM in IRST.

Do Casablanca and IRST use different time zones?

Casablanca (Morocco) uses UTC+01:00 at UTC+01:00, while IRST uses IRST at UTC+03:30. The IANA identifiers are Africa/Casablanca and Asia/Tehran.

Does daylight saving time affect the Casablanca–IRST difference?

Neither zone observes daylight saving time, so the +2h 30m offset between Casablanca and IRST is fixed all year.

Which other cities share Casablanca's time zone?

UTC+01:00 also covers Lisbon, Porto, Casablanca, Las Palmas, Funchal, Rabat.

Which countries use UTC+01:00, Casablanca's zone?

UTC+01:00 is used in Portugal, Spain (Canary Islands), Morocco, Western Sahara.

Is there a day difference between Casablanca and IRST?

Not normally. The +2h 30m gap only pushes the date over for late-evening times.

What is the time difference between Casablanca and IRST?

IRST is +2h 30m from Casablanca.

What timezone is Casablanca in?

Casablanca operates on its local timezone.

What timezone is IRST in?

IRST operates on its local timezone.

Which countries use WET (Western European Time)?

WET is used in Portugal, Spain (Canary Islands), Morocco, Western Sahara.

Does WET observe daylight saving time?

Yes, WET switches to WEST during summer months.

What are some interesting facts about WET?

Portugal is the only mainland European country in the WET time zone. The Canary Islands are on WET despite being part of Spain (which uses CET).

Which cities are in the IRST timezone?

Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.

What is the UTC offset for IRST?

Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.

What should I know about the IRST timezone?

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).

When is it midnight in Casablanca, what time is it in IRST?

When it is 12:00 AM (midnight) in Casablanca (WET), it is +2h 30m later in IRST (IRST).

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