Bangkok to Tehran Time
ICT to IRST Converter — 9 AM ICT is 5:30 AM IRST
Bangkok is 3 hours and 30 minutes ahead of Tehran. Convert any time between Bangkok (ICT) and Tehran (IRST/IRDT) instantly.
Bangkok
Thailand
Tehran
Iran
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Time Zone Comparison
Bangkok to Tehran Time Conversion Table
| Bangkok (ICT) | Tehran (IRST) |
|---|---|
| 12:00 AM | 8:30 PM |
| 2:00 AM | 10:30 PM |
| 4:00 AM | 12:30 AM |
| 6:00 AM | 2:30 AM |
| 8:00 AM | 4:30 AM |
| 10:00 AM | 6:30 AM |
| 12:00 PM | 8:30 AM |
| 2:00 PM | 10:30 AM |
| 4:00 PM | 12:30 PM |
| 6:00 PM | 2:30 PM |
| 8:00 PM | 4:30 PM |
| 10:00 PM | 6:30 PM |
Bangkok & Tehran — Business & Scheduling Guide
Bangkok (Thailand) 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 Bangkok and Tehran
The 3.5-hour difference between Bangkok 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
Tehran observes Daylight Saving Time (IRST/IRDT), while Bangkok stays on ICT year-round. When Tehran switches to daylight time, the effective time difference shifts by 1 hour. This typically happens in spring and fall, and the exact dates vary by country. If you have recurring cross-timezone meetings, recalculate the schedule after each DST transition.
ICT to IRST — Quick Reference
ICT (ICT) stands for the timezone used in Bangkok, Thailand (UTC+7). IRST (IRST/IRDT) is the timezone used in Tehran, Iran (UTC+3:30). Bangkok is 3 hours and 30 minutes ahead of Tehran.
To convert ICT to IRST, subtract 3.5 hours from ICT time. For example, ICT 9:00 AM = IRST 5:30 AM.
Key Facts
- •Time difference: Bangkok (UTC+7) is 3 hours and 30 minutes ahead of Tehran (UTC+3:30).
- •Daylight Saving Time: Bangkok does not observe DST (ICT). Tehran observes DST (IRST/IRDT).
- •Regions: Bangkok is located in Thailand and uses the ICT time zone. Tehran is located in Iran and uses the IRST/IRDT time zone.
- •Best time to call: The best time to call between Bangkok and Tehran is 1:00 PM to 4:00 PM in Bangkok time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Bangkok and Tehran?
Bangkok is 3 hours and 30 minutes ahead of Tehran.
What time is it in Tehran when it's 9 AM in Bangkok?
When it's 9:00 AM in Bangkok, it is 5:30 AM in Tehran.
What time is 9 PM ICT in IRST?
9 PM ICT (Bangkok time) is 5:30 PM 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 Bangkok and Tehran?
The best time to schedule a meeting is between 1:00 PM to 4:00 PM in Bangkok 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 ICT to IRST?
ICT (ICT) is the timezone for Bangkok, Thailand (UTC+7). IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). Bangkok is 3 hours and 30 minutes ahead of Tehran. Quick examples: 9 AM ICT = 5:30 AM IRST, 12 PM ICT = 8:30 AM IRST, 3 PM ICT = 11:30 AM IRST, 6 PM ICT = 2:30 PM IRST.
Is Bangkok ahead of or behind Tehran?
Bangkok is 3 hours 30 minutes ahead of Tehran. When it's noon in Bangkok, it's 8:30 AM in Tehran.
Does Bangkok or Tehran change clocks for Daylight Saving Time?
No, Bangkok does not observe DST — it stays on ICT year-round. Tehran observes DST and switches between IRST/IRDT. 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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