Singapore to Tehran Time
SGT to IRST Converter — 9 AM SGT is 4:30 AM IRST
Singapore is 4 hours and 30 minutes ahead of Tehran. Convert any time between Singapore (SGT) and Tehran (IRST/IRDT) instantly.
Singapore
Singapore
Tehran
Iran
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Time Zone Comparison
Singapore to Tehran Time Conversion Table
| Singapore (SGT) | Tehran (IRST) |
|---|---|
| 12:00 AM | 7:30 PM |
| 2:00 AM | 9:30 PM |
| 4:00 AM | 11:30 PM |
| 6:00 AM | 1:30 AM |
| 8:00 AM | 3:30 AM |
| 10:00 AM | 5:30 AM |
| 12:00 PM | 7:30 AM |
| 2:00 PM | 9:30 AM |
| 4:00 PM | 11:30 AM |
| 6:00 PM | 1:30 PM |
| 8:00 PM | 3:30 PM |
| 10:00 PM | 5:30 PM |
Singapore & Tehran — Business & Scheduling Guide
Singapore (Singapore) is a major global financial center and shipping hub, with key industries in finance, biotechnology, electronics, and logistics. Tehran (Iran) is an important regional economy, known for diverse sectors including services and trade. With a 4.5-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 Singapore and Tehran
The 4.5-hour difference between Singapore and Tehran requires careful scheduling. The best overlap window is typically 2–4 hours when both cities are within working hours. Singapore's business hours are typically 9 AM–6 PM, with a multicultural and efficiency-driven work environment. 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 Singapore stays on SGT 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.
SGT to IRST — Quick Reference
SGT (SGT) stands for the timezone used in Singapore, Singapore (UTC+8). IRST (IRST/IRDT) is the timezone used in Tehran, Iran (UTC+3:30). Singapore is 4 hours and 30 minutes ahead of Tehran.
To convert SGT to IRST, subtract 4.5 hours from SGT time. For example, SGT 9:00 AM = IRST 4:30 AM.
Key Facts
- •Time difference: Singapore (UTC+8) is 4 hours and 30 minutes ahead of Tehran (UTC+3:30).
- •Daylight Saving Time: Singapore does not observe DST (SGT). Tehran observes DST (IRST/IRDT).
- •Regions: Singapore is located in Singapore and uses the SGT time zone. Tehran is located in Iran and uses the IRST/IRDT time zone.
- •Best time to call: The best time to call between Singapore and Tehran is 2:00 PM to 4:00 PM in Singapore time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Singapore and Tehran?
Singapore is 4 hours and 30 minutes ahead of Tehran.
What time is it in Tehran when it's 9 AM in Singapore?
When it's 9:00 AM in Singapore, it is 4:30 AM in Tehran.
What time is 9 PM SGT in IRST?
9 PM SGT (Singapore time) is 4:30 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 Singapore and Tehran?
The best time to schedule a meeting is between 2:00 PM to 4:00 PM in Singapore 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 SGT to IRST?
SGT (SGT) is the timezone for Singapore, Singapore (UTC+8). IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). Singapore is 4 hours and 30 minutes ahead of Tehran. Quick examples: 9 AM SGT = 4:30 AM IRST, 12 PM SGT = 7:30 AM IRST, 3 PM SGT = 10:30 AM IRST, 6 PM SGT = 1:30 PM IRST.
Is Singapore ahead of or behind Tehran?
Singapore is 4 hours 30 minutes ahead of Tehran. When it's noon in Singapore, it's 7:30 AM in Tehran.
Does Singapore or Tehran change clocks for Daylight Saving Time?
No, Singapore does not observe DST — it stays on SGT 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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