Tehran to Lisbon Time
IRST to WET Converter — 9 AM IRST is 5:30 AM WET
Tehran is 3 hours and 30 minutes ahead of Lisbon. Convert any time between Tehran (IRST/IRDT) and Lisbon (WET/WEST) instantly.
Tehran
Iran
Lisbon
Portugal
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Time Zone Comparison
Tehran to Lisbon Time Conversion Table
| Tehran (IRST) | Lisbon (WET) |
|---|---|
| 12:00 AM | 9:30 PM |
| 2:00 AM | 11:30 PM |
| 4:00 AM | 1:30 AM |
| 6:00 AM | 3:30 AM |
| 8:00 AM | 5:30 AM |
| 10:00 AM | 7:30 AM |
| 12:00 PM | 9:30 AM |
| 2:00 PM | 11:30 AM |
| 4:00 PM | 1:30 PM |
| 6:00 PM | 3:30 PM |
| 8:00 PM | 5:30 PM |
| 10:00 PM | 7:30 PM |
Tehran & Lisbon — Business & Scheduling Guide
Tehran (Iran) is an important regional economy, with key industries in diverse sectors including services and trade. Lisbon (Portugal) is an important regional economy, known for diverse sectors including services and trade. With a 3.5-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Tehran and Lisbon
The 3.5-hour difference between Tehran and Lisbon requires careful scheduling. The best overlap window is typically 2–4 hours when both cities are within working hours. Business hours typically follow a 9 AM–5 PM schedule. Business hours typically follow a 9 AM–5 PM schedule. Teams often designate specific "overlap hours" for real-time collaboration and use asynchronous communication (Slack, email, recorded video) for the rest of the day.
Daylight Saving Time Considerations
Both Tehran and Lisbon observe Daylight Saving Time. Tehran uses IRST/IRDT (switching between standard and daylight time), while Lisbon uses WET/WEST. If their DST transitions happen on different dates — which is common, as the US, EU, and other regions change clocks on different weekends — the effective time difference between the two cities can shift by 1 hour for several weeks. Always double-check the actual offset during March–April and October–November.
IRST to WET — Quick Reference
IRST (IRST/IRDT) stands for the timezone used in Tehran, Iran (UTC+3:30). WET (WET/WEST) is the timezone used in Lisbon, Portugal (UTC+0). Tehran is 3 hours and 30 minutes ahead of Lisbon.
To convert IRST to WET, subtract 3.5 hours from IRST time. For example, IRST 9:00 AM = WET 5:30 AM.
Key Facts
- •Time difference: Tehran (UTC+3:30) is 3 hours and 30 minutes ahead of Lisbon (UTC+0).
- •Daylight Saving Time: Tehran observes DST (IRST/IRDT). Lisbon observes DST (WET/WEST).
- •Regions: Tehran is located in Iran and uses the IRST/IRDT time zone. Lisbon is located in Portugal and uses the WET/WEST time zone.
- •Best time to call: The best time to call between Tehran and Lisbon is 1:00 PM to 4:00 PM in Tehran time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Tehran and Lisbon?
Tehran is 3 hours and 30 minutes ahead of Lisbon.
What time is it in Lisbon when it's 9 AM in Tehran?
When it's 9:00 AM in Tehran, it is 5:30 AM in Lisbon.
What time is 9 PM IRST in WET?
9 PM IRST (Tehran time) is 5:30 PM WET (Lisbon time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Tehran and Lisbon?
The best time to schedule a meeting is between 1:00 PM to 4:00 PM in Tehran time, when both cities are within standard working hours (9 AM – 5 PM). This gives you the maximum overlap window for real-time collaboration.
How do I convert IRST to WET?
IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). WET (WET/WEST) is the timezone for Lisbon, Portugal (UTC+0). Tehran is 3 hours and 30 minutes ahead of Lisbon. Quick examples: 9 AM IRST = 5:30 AM WET, 12 PM IRST = 8:30 AM WET, 3 PM IRST = 11:30 AM WET, 6 PM IRST = 2:30 PM WET.
Is Tehran ahead of or behind Lisbon?
Tehran is 3 hours 30 minutes ahead of Lisbon. When it's noon in Tehran, it's 8:30 AM in Lisbon.
Does Tehran or Lisbon change clocks for Daylight Saving Time?
Yes, Tehran observes DST and switches between IRST/IRDT. Lisbon observes DST and switches between WET/WEST.
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