Tehran to Lisbon
-2h 30mTehran
IRSTSOURCELisbon
WESTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and WEST on the World Map
The map below highlights the IRST (Iran Standard Time) and WEST (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).
About Lisbon
WikipediaLisbon operates on Western European Time (WET/WEST), same as London. As Portugal's capital and an emerging tech hub, Lisbon bridges European and Atlantic time zones.
Lisbon has 300 days of sunshine per year and is a major startup hub in Europe.
Everything You Need to Know About Tehran and Lisbon Time
Tehran runs on Iran Standard Time (IRST) at UTC+03:30. Lisbon runs on Western European Summer Time (WEST) at UTC+01:00, also currently on daylight saving time. That puts Tehran 2 hours 30 minutes behind Lisbon — a difference of -2h 30m at the current offsets.
In practice, when it is 9:00 AM in Tehran it is 6:30 AM in Lisbon. Midnight in Tehran is 9:30 PM in Lisbon.Lisbon observes daylight saving time while Tehran does not, so the gap narrows or widens by an hour part of the year.
Tehran to Lisbon time conversion table
| Tehran (IRST) | Lisbon (WEST) | 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 Tehran to Lisbon time
- Scheduling a call from Tehran to Lisbon: a 10:00 AM start in Tehran lands at 7:30 AM in Lisbon, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Tehran and Lisbon are inside the 9-to-5 working day between 11:30 AM and 5:00 PM IRST time (9:00 AM–2:30 PM WEST). That is roughly 5 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Tehran is 5:30 PM in Lisbon 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 Tehran and need Lisbon colleagues present.
- Lisbon: Clocks fall back on Sun, Oct 25, 2026. 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 Tehran and Lisbon
Both Tehran and Lisbon 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 WEST. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Tehran and Lisbon share 5 hours of working-hours overlap (11:30 AM–5:00 PM IRST), so scheduling a live meeting is straightforward.
Tehran is 2 hours 30 minutes behind Lisbon (IRST UTC+03:30 → WEST 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
Tehran
Does not observe DST
Lisbon
☀ 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 Lisbon?
Tehran (IRST, UTC+03:30) is 2 hours 30 minutes behind Lisbon (WEST, UTC+01:00). The gap is currently -2h 30m.
How do I convert Tehran time to Lisbon time?
Add -2h 30m to Tehran local time. For example, 9:00 AM in Tehran is 6:30 AM in Lisbon.
What time is it in Lisbon right now?
Lisbon uses WEST 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 Tehran.
What is the best time to call Lisbon from Tehran?
Call between 11:30 AM and 5:00 PM IRST — that maps to 9:00 AM–2:30 PM WEST and keeps both parties inside the working day.
Which is behind, Tehran or Lisbon?
Tehran is 2 hours 30 minutes behind Lisbon. When it is 12:00 PM in Tehran it is 9:30 AM in Lisbon.
Do Tehran and Lisbon use different time zones?
Tehran (Iran) uses IRST at UTC+03:30, while Lisbon (Portugal) uses WEST at UTC+01:00. The IANA identifiers are Asia/Tehran and Europe/Lisbon.
Does daylight saving time affect the Tehran–Lisbon difference?
Yes at the moment: Lisbon is on daylight saving time and Tehran is not, so the -2h 30m gap shifts by an hour when exactly one of them changes clocks.
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 Lisbon?
Not normally. The -2h 30m gap only pushes the date over the previous day.
What is the time difference between Tehran and Lisbon?
Lisbon is -2h 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 Lisbon in?
Lisbon operates on Western European Time (WET/WEST), same as London. As Portugal's capital and an emerging tech hub, Lisbon bridges European and Atlantic time zones.
What are the business hours in Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
What are the business hours in Lisbon?
Standard business hours in Lisbon are 9:00 AM - 6:00 PM WET.
What is the best time to schedule a call between Tehran and Lisbon?
The best overlap for a call is when both cities are in business hours. Tehran works 8:00 AM - 4:00 PM IRST and Lisbon works 9:00 AM - 6:00 PM WET (-2h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Tehran and Lisbon?
Tehran uses IRR (﷼) while Lisbon uses EUR (€). Check current exchange rates when planning travel or business between these cities.
How do Tehran and Lisbon compare in size?
Tehran has a population of approximately 9.4 million (metro: 16.8 million), while Lisbon has approximately 545,000 (metro: 2.9 million).
What are the major landmarks in Tehran and Lisbon?
Tehran is known for Azadi Tower, Golestan Palace, Grand Bazaar. Lisbon is famous for Belém Tower, Jerónimos Monastery, São Jorge Castle.
Do Tehran and Lisbon have stock exchanges?
Yes. Tehran has the TSE (Tehran Stock Exchange) and Lisbon has the Euronext Lisbon. The -2h 30m time difference affects trading hour overlaps between these exchanges.
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 Lisbon?
When it is 12:00 AM (midnight) in Tehran (IRST), it is -2h 30m later in Lisbon (WET).
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