IRST to Casablanca
-2h 30mIRST
IRSTSOURCECasablanca
UTC+01:00Green rows indicate typical business hours (9 AM - 5 PM)
IRST and UTC+01:00 on the World Map
The map below highlights the IRST (Iran Standard Time) and UTC+01:00 (Western European Time) timezone regions across the globe.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •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.
WET – Western European Time
UTC+00:00Western European Time (WET) is the time zone for Portugal, Morocco, and the Canary Islands, same as UTC+00:00.
- •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.
IRST to Casablanca Time Difference – Complete Guide
IRST runs on Iran Standard Time (IRST) at UTC+03:30. Casablanca runs on Western European Time (UTC+01:00) at UTC+01:00. That puts IRST 2 hours 30 minutes behind Casablanca — a difference of -2h 30m at the current offsets.
In practice, when it is 9:00 AM in IRST it is 6:30 AM in Casablanca. Midnight in IRST is 9:30 PM in Casablanca. Neither zone observes daylight saving time, so the offset between them stays constant all year.
IRST to Casablanca time conversion table
| IRST (IRST) | Casablanca (UTC+01:00) | Day |
|---|---|---|
| 12:00 AM | 9:30 PM | previous day |
| 6:00 AM | 3:30 AM | same day |
| 7:00 AM | 4:30 AM | same day |
| 8:00 AM | 5:30 AM | same day |
| 9:00 AM | 6:30 AM | same day |
| 12:00 PM | 9:30 AM | same day |
| 3:00 PM | 12:30 PM | same day |
| 5:00 PM | 2:30 PM | same day |
| 6:00 PM | 3:30 PM | same day |
| 9:00 PM | 6:30 PM | same day |
Why people convert IRST to Casablanca time
- Scheduling a call from IRST to Casablanca: a 10:00 AM start in IRST lands at 7:30 AM in Casablanca, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both IRST and Casablanca are inside the 9-to-5 working day between 11:30 AM and 5:00 PM IRST time (9:00 AM–2:30 PM UTC+01:00). That is roughly 5 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in IRST is 5:30 PM in Casablanca makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a -2h 30m gap is not.
- Block 11:30 AM–5:00 PM IRST as the recurring meeting window if you work primarily from IRST and need Casablanca colleagues present.
- Casablanca: Clocks fall back on Sun, Feb 7, 2027. Any meeting series spanning that date will shift by an hour in local time.
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 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).
Best time to call between IRST and Casablanca
Both IRST and Casablanca sit inside the 9 AM – 5 PM working day between 11:30 AM–5:00 PM IRST, which is 9:00 AM–2:30 PM UTC+01:00. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
IRST and Casablanca share 5 hours of working-hours overlap (11:30 AM–5:00 PM IRST), so scheduling a live meeting is straightforward.
IRST is 2 hours 30 minutes behind Casablanca (IRST UTC+03:30 → UTC+01:00 UTC+01:00). The shared working window is 11:30 AM–5:00 PM IRST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
IRST
Does not observe DST
Casablanca
❄ Currently in Standard Time
Standard: UTC+01:00 · DST: UTC+00:00
Clocks fall back on Sun, Feb 7, 2027
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between IRST and Casablanca?
IRST (IRST, UTC+03:30) is 2 hours 30 minutes behind Casablanca (UTC+01:00, UTC+01:00). The gap is currently -2h 30m.
How do I convert IRST time to Casablanca time?
Add -2h 30m to IRST local time. For example, 9:00 AM in IRST is 6:30 AM in Casablanca.
What time is it in Casablanca right now?
Casablanca uses UTC+01:00 at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h 30m offset from IRST.
What is the best time to call Casablanca from IRST?
Call between 11:30 AM and 5:00 PM IRST — that maps to 9:00 AM–2:30 PM UTC+01:00 and keeps both parties inside the working day.
Which is behind, IRST or Casablanca?
IRST is 2 hours 30 minutes behind Casablanca. When it is 12:00 PM in IRST it is 9:30 AM in Casablanca.
Do IRST and Casablanca use different time zones?
IRST uses IRST at UTC+03:30, while Casablanca (Morocco) uses UTC+01:00 at UTC+01:00. The IANA identifiers are Asia/Tehran and Africa/Casablanca.
Does daylight saving time affect the IRST–Casablanca difference?
Neither zone observes daylight saving time, so the -2h 30m offset between IRST and Casablanca is fixed all year.
Which other cities share IRST's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, IRST's zone?
IRST is used in Iran.
Is there a day difference between IRST and Casablanca?
Not normally. The -2h 30m gap only pushes the date over the previous day.
What is the time difference between IRST and Casablanca?
Casablanca is -2h 30m from IRST.
What timezone is IRST in?
IRST operates on its local timezone.
What timezone is Casablanca in?
Casablanca operates on its local timezone.
Which countries use IRST (Iran Standard Time)?
IRST is used in Iran.
Does IRST observe daylight saving time?
Yes, IRST switches to IRDT during summer months.
What are some interesting 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).
Which cities are in the WET timezone?
Major cities in the WET timezone include Lisbon, Porto, Casablanca, Las Palmas, Funchal, Rabat.
What is the UTC offset for WET?
Western European Time (WET) is at UTC+00:00. During daylight saving time, it shifts to WEST.
What should I know about the WET timezone?
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).
When is it midnight in IRST, what time is it in Casablanca?
When it is 12:00 AM (midnight) in IRST (IRST), it is -2h 30m later in Casablanca (WET).
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