Tehran to Bangkok Time
IRST to ICT Converter — 9 AM IRST is 12:30 PM ICT
Tehran is 3 hours and 30 minutes behind Bangkok. Convert any time between Tehran (IRST/IRDT) and Bangkok (ICT) instantly.
Tehran
Iran
Bangkok
Thailand
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Time Zone Comparison
Tehran to Bangkok Time Conversion Table
| Tehran (IRST) | Bangkok (ICT) |
|---|---|
| 12:00 AM | 3:30 AM |
| 2:00 AM | 5:30 AM |
| 4:00 AM | 7:30 AM |
| 6:00 AM | 9:30 AM |
| 8:00 AM | 11:30 AM |
| 10:00 AM | 1:30 PM |
| 12:00 PM | 3:30 PM |
| 2:00 PM | 5:30 PM |
| 4:00 PM | 7:30 PM |
| 6:00 PM | 9:30 PM |
| 8:00 PM | 11:30 PM |
| 10:00 PM | 1:30 AM |
Tehran & Bangkok — Business & Scheduling Guide
Tehran (Iran) is an important regional economy, with key industries in diverse sectors including services and trade. Bangkok (Thailand) 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 Bangkok
The 3.5-hour difference between Tehran and Bangkok 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
Tehran observes Daylight Saving Time (IRST/IRDT), but Bangkok does not — it stays on ICT year-round. This means the time difference between Tehran and Bangkok changes by 1 hour when Tehran switches clocks. During Iran's summer, the gap is 2.5–4.5 hours instead of the standard 3.5 hours. Mark DST transition dates on your calendar to avoid missed meetings.
IRST to ICT — Quick Reference
IRST (IRST/IRDT) stands for the timezone used in Tehran, Iran (UTC+3:30). ICT (ICT) is the timezone used in Bangkok, Thailand (UTC+7). Tehran is 3 hours and 30 minutes behind Bangkok.
To convert IRST to ICT, add 3.5 hours to IRST time. For example, IRST 9:00 AM = ICT 12:30 PM.
Key Facts
- •Time difference: Tehran (UTC+3:30) is 3 hours and 30 minutes behind Bangkok (UTC+7).
- •Daylight Saving Time: Tehran observes DST (IRST/IRDT). Bangkok does not observe DST (ICT).
- •Regions: Tehran is located in Iran and uses the IRST/IRDT time zone. Bangkok is located in Thailand and uses the ICT time zone.
- •Best time to call: The best time to call between Tehran and Bangkok is 9:00 AM to 1:00 PM in Tehran time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Tehran and Bangkok?
Tehran is 3 hours and 30 minutes behind Bangkok.
What time is it in Bangkok when it's 9 AM in Tehran?
When it's 9:00 AM in Tehran, it is 12:30 PM in Bangkok.
What time is 9 PM IRST in ICT?
9 PM IRST (Tehran time) is 12:30 AM ICT (Bangkok 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 Bangkok?
The best time to schedule a meeting is between 9:00 AM to 1:00 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 ICT?
IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). ICT (ICT) is the timezone for Bangkok, Thailand (UTC+7). Tehran is 3 hours and 30 minutes behind Bangkok. Quick examples: 9 AM IRST = 12:30 PM ICT, 12 PM IRST = 3:30 PM ICT, 3 PM IRST = 6:30 PM ICT, 6 PM IRST = 9:30 PM ICT.
Is Tehran ahead of or behind Bangkok?
Tehran is 3 hours 30 minutes behind Bangkok. When it's noon in Tehran, it's 3:30 PM in Bangkok.
Does Tehran or Bangkok change clocks for Daylight Saving Time?
Yes, Tehran observes DST and switches between IRST/IRDT. Bangkok does not observe DST — it stays on ICT year-round. Because only one city observes DST, the time difference shifts by 1 hour during transition periods (typically March/April and October/November).
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