Tehran to Dublin Time
IRST to GMT Converter — 9 AM IRST is 5:30 AM GMT
Tehran is 3 hours and 30 minutes ahead of Dublin. Convert any time between Tehran (IRST/IRDT) and Dublin (GMT/IST) instantly.
Tehran
Iran
Dublin
Ireland
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Time Zone Comparison
Tehran to Dublin Time Conversion Table
| Tehran (IRST) | Dublin (GMT) |
|---|---|
| 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 & Dublin — Business & Scheduling Guide
Tehran (Iran) is an important regional economy, with key industries in diverse sectors including services and trade. Dublin (Ireland) 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 Dublin
The 3.5-hour difference between Tehran and Dublin 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 Dublin observe Daylight Saving Time. Tehran uses IRST/IRDT (switching between standard and daylight time), while Dublin uses GMT/IST. 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 GMT — Quick Reference
IRST (IRST/IRDT) stands for the timezone used in Tehran, Iran (UTC+3:30). GMT (GMT/IST) is the timezone used in Dublin, Ireland (UTC+0). Tehran is 3 hours and 30 minutes ahead of Dublin.
To convert IRST to GMT, subtract 3.5 hours from IRST time. For example, IRST 9:00 AM = GMT 5:30 AM.
Key Facts
- •Time difference: Tehran (UTC+3:30) is 3 hours and 30 minutes ahead of Dublin (UTC+0).
- •Daylight Saving Time: Tehran observes DST (IRST/IRDT). Dublin observes DST (GMT/IST).
- •Regions: Tehran is located in Iran and uses the IRST/IRDT time zone. Dublin is located in Ireland and uses the GMT/IST time zone.
- •Best time to call: The best time to call between Tehran and Dublin 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 Dublin?
Tehran is 3 hours and 30 minutes ahead of Dublin.
What time is it in Dublin when it's 9 AM in Tehran?
When it's 9:00 AM in Tehran, it is 5:30 AM in Dublin.
What time is 9 PM IRST in GMT?
9 PM IRST (Tehran time) is 5:30 PM GMT (Dublin 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 Dublin?
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 GMT?
IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). GMT (GMT/IST) is the timezone for Dublin, Ireland (UTC+0). Tehran is 3 hours and 30 minutes ahead of Dublin. Quick examples: 9 AM IRST = 5:30 AM GMT, 12 PM IRST = 8:30 AM GMT, 3 PM IRST = 11:30 AM GMT, 6 PM IRST = 2:30 PM GMT.
Is Tehran ahead of or behind Dublin?
Tehran is 3 hours 30 minutes ahead of Dublin. When it's noon in Tehran, it's 8:30 AM in Dublin.
Does Tehran or Dublin change clocks for Daylight Saving Time?
Yes, Tehran observes DST and switches between IRST/IRDT. Dublin observes DST and switches between GMT/IST.
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