Tehran to WET
-3h 30mTehran
IRSTSOURCEWET
WETGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and WET on the World Map
The map below highlights the IRST (Iran Standard Time) and WET (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.
About Tehran
WikipediaTehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).
Tehran vs WET: Offsets, DST and Best Call Times
Tehran runs on Iran Standard Time (IRST) at UTC+03:30. WET runs on Western European Time (WET) at UTC+00:00. That puts Tehran 3 hours 30 minutes behind WET — a difference of -3h 30m at the current offsets.
In practice, when it is 9:00 AM in Tehran it is 5:30 AM in WET. Midnight in Tehran is 8:30 PM in WET. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Tehran to WET time conversion table
| Tehran (IRST) | WET (WET) | Day |
|---|---|---|
| 12:00 AM | 8:30 PM | previous day |
| 6:00 AM | 2:30 AM | same day |
| 7:00 AM | 3:30 AM | same day |
| 8:00 AM | 4:30 AM | same day |
| 9:00 AM | 5:30 AM | same day |
| 12:00 PM | 8:30 AM | same day |
| 3:00 PM | 11:30 AM | same day |
| 5:00 PM | 1:30 PM | same day |
| 6:00 PM | 2:30 PM | same day |
| 9:00 PM | 5:30 PM | same day |
Why people convert Tehran to WET time
- Scheduling a call from Tehran to WET: a 10:00 AM start in Tehran lands at 6:30 AM in WET, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Tehran and WET are inside the 9-to-5 working day between 12:30 PM and 5:00 PM IRST time (9:00 AM–1:30 PM WET). That is roughly 4 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Tehran is 4:30 PM in WET 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 -3h 30m gap is not.
- Block 12:30 PM–5:00 PM IRST as the recurring meeting window if you work primarily from Tehran and need WET colleagues present.
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 Tehran and WET
Both Tehran and WET sit inside the 9 AM – 5 PM working day between 12:30 PM–5:00 PM IRST, which is 9:00 AM–1:30 PM WET. That gives roughly 4 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Tehran and WET overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
Tehran is 3 hours 30 minutes behind WET (IRST UTC+03:30 → WET UTC+00:00). The shared working window is 12:30 PM–5:00 PM IRST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Tehran
Does not observe DST
WET
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
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 Tehran and WET?
Tehran (IRST, UTC+03:30) is 3 hours 30 minutes behind WET (WET, UTC+00:00). The gap is currently -3h 30m.
How do I convert Tehran time to WET time?
Add -3h 30m to Tehran local time. For example, 9:00 AM in Tehran is 5:30 AM in WET.
What time is it in WET right now?
WET uses WET at UTC+00:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -3h 30m offset from Tehran.
What is the best time to call WET from Tehran?
Call between 12:30 PM and 5:00 PM IRST — that maps to 9:00 AM–1:30 PM WET and keeps both parties inside the working day.
Which is behind, Tehran or WET?
Tehran is 3 hours 30 minutes behind WET. When it is 12:00 PM in Tehran it is 8:30 AM in WET.
Do Tehran and WET use different time zones?
Tehran (Iran) uses IRST at UTC+03:30, while WET uses WET at UTC+00:00. The IANA identifiers are Asia/Tehran and Europe/Lisbon.
Does daylight saving time affect the Tehran–WET difference?
Neither zone observes daylight saving time, so the -3h 30m offset between Tehran and WET is fixed all year.
Which other cities share Tehran's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, Tehran's zone?
IRST is used in Iran.
Is there a day difference between Tehran and WET?
Not normally. The -3h 30m gap only pushes the date over the previous day.
What is the time difference between Tehran and WET?
WET is -3h 30m from Tehran.
What timezone is Tehran in?
Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
What timezone is WET in?
WET operates on its local timezone.
What are the business hours in Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
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 Tehran, what time is it in WET?
When it is 12:00 AM (midnight) in Tehran (IRST), it is -3h 30m later in WET (WET).
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