Dublin to Tehran Time
GMT to IRST Converter — 9 AM GMT is 12:30 PM IRST
Dublin is 3 hours and 30 minutes behind Tehran. Convert any time between Dublin (GMT/IST) and Tehran (IRST/IRDT) instantly.
Dublin
Ireland
Tehran
Iran
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Dublin to Tehran Time Conversion Table
| Dublin (GMT) | Tehran (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 |
Dublin & Tehran — Business & Scheduling Guide
Dublin (Ireland) is an important regional economy, with key industries in diverse sectors including services and trade. Tehran (Iran) 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 Dublin and Tehran
The 3.5-hour difference between Dublin and Tehran 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 Dublin and Tehran observe Daylight Saving Time. Dublin uses GMT/IST (switching between standard and daylight time), while Tehran uses IRST/IRDT. 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.
GMT to IRST — Quick Reference
GMT (GMT/IST) stands for the timezone used in Dublin, Ireland (UTC+0). IRST (IRST/IRDT) is the timezone used in Tehran, Iran (UTC+3:30). Dublin is 3 hours and 30 minutes behind Tehran.
To convert GMT to IRST, add 3.5 hours to GMT time. For example, GMT 9:00 AM = IRST 12:30 PM.
Key Facts
- •Time difference: Dublin (UTC+0) is 3 hours and 30 minutes behind Tehran (UTC+3:30).
- •Daylight Saving Time: Dublin observes DST (GMT/IST). Tehran observes DST (IRST/IRDT).
- •Regions: Dublin is located in Ireland and uses the GMT/IST time zone. Tehran is located in Iran and uses the IRST/IRDT time zone.
- •Best time to call: The best time to call between Dublin and Tehran is 9:00 AM to 1:00 PM in Dublin time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Dublin and Tehran?
Dublin is 3 hours and 30 minutes behind Tehran.
What time is it in Tehran when it's 9 AM in Dublin?
When it's 9:00 AM in Dublin, it is 12:30 PM in Tehran.
What time is 9 PM GMT in IRST?
9 PM GMT (Dublin time) is 12:30 AM IRST (Tehran 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 Dublin and Tehran?
The best time to schedule a meeting is between 9:00 AM to 1:00 PM in Dublin 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 GMT to IRST?
GMT (GMT/IST) is the timezone for Dublin, Ireland (UTC+0). IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). Dublin is 3 hours and 30 minutes behind Tehran. Quick examples: 9 AM GMT = 12:30 PM IRST, 12 PM GMT = 3:30 PM IRST, 3 PM GMT = 6:30 PM IRST, 6 PM GMT = 9:30 PM IRST.
Is Dublin ahead of or behind Tehran?
Dublin is 3 hours 30 minutes behind Tehran. When it's noon in Dublin, it's 3:30 PM in Tehran.
Does Dublin or Tehran change clocks for Daylight Saving Time?
Yes, Dublin observes DST and switches between GMT/IST. Tehran observes DST and switches between IRST/IRDT.
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