Phoenix to Tehran Time
MST to IRST Converter — 9 AM MST is 7:30 PM IRST
Phoenix is 10 hours and 30 minutes behind Tehran. Convert any time between Phoenix (MST) and Tehran (IRST/IRDT) instantly.
Phoenix
United States
Tehran
Iran
Add Time Zones to Compare
Time Zone Comparison
Phoenix to Tehran Time Conversion Table
| Phoenix (MST) | Tehran (IRST) |
|---|---|
| 12:00 AM | 10:30 AM |
| 2:00 AM | 12:30 PM |
| 4:00 AM | 2:30 PM |
| 6:00 AM | 4:30 PM |
| 8:00 AM | 6:30 PM |
| 10:00 AM | 8:30 PM |
| 12:00 PM | 10:30 PM |
| 2:00 PM | 12:30 AM |
| 4:00 PM | 2:30 AM |
| 6:00 PM | 4:30 AM |
| 8:00 PM | 6:30 AM |
| 10:00 PM | 8:30 AM |
Phoenix & Tehran — Business & Scheduling Guide
Phoenix (United States) is a global financial and tech hub, with key industries in technology, finance, healthcare, and entertainment. Tehran (Iran) is an important regional economy, known for diverse sectors including services and trade. With a 10.5-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 Phoenix and Tehran
With Tehran 10.5 hours ahead of Phoenix, there is minimal overlap in standard business hours. Most teams alternate meeting times to share the burden of early-morning or late-evening calls fairly. US business hours typically run 9 AM–5 PM, with a culture that values punctuality and efficiency. Business hours typically follow a 9 AM–5 PM schedule. Consider recording meetings for those who can't attend live, and use shared documents for async collaboration.
Daylight Saving Time Considerations
Tehran observes Daylight Saving Time (IRST/IRDT), while Phoenix stays on MST 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.
MST to IRST — Quick Reference
MST (MST) stands for the timezone used in Phoenix, United States (UTC-7). IRST (IRST/IRDT) is the timezone used in Tehran, Iran (UTC+3:30). Phoenix is 10 hours and 30 minutes behind Tehran.
To convert MST to IRST, add 10.5 hours to MST time. For example, MST 9:00 AM = IRST 7:30 PM.
Key Facts
- •Time difference: Phoenix (UTC-7) is 10 hours and 30 minutes behind Tehran (UTC+3:30).
- •Daylight Saving Time: Phoenix does not observe DST (MST). Tehran observes DST (IRST/IRDT).
- •Regions: Phoenix is located in United States and uses the MST time zone. Tehran is located in Iran and uses the IRST/IRDT time zone.
- •Best time to call: There are no overlapping standard work hours (9 AM - 5 PM) between these two cities.
Frequently Asked Questions
What is the time difference between Phoenix and Tehran?
Phoenix is 10 hours and 30 minutes behind Tehran.
What time is it in Tehran when it's 9 AM in Phoenix?
When it's 9:00 AM in Phoenix, it is 7:30 PM in Tehran.
What time is 9 PM MST in IRST?
9 PM MST (Phoenix time) is 7:30 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 Phoenix and Tehran?
There are no overlapping standard work hours (9 AM - 5 PM) between these two cities.
How do I convert MST to IRST?
MST (MST) is the timezone for Phoenix, United States (UTC-7). IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). Phoenix is 10 hours and 30 minutes behind Tehran. Quick examples: 9 AM MST = 7:30 PM IRST, 12 PM MST = 10:30 PM IRST, 3 PM MST = 1:30 AM IRST, 6 PM MST = 4:30 AM IRST.
Is Phoenix ahead of or behind Tehran?
Phoenix is 10 hours 30 minutes behind Tehran. When it's noon in Phoenix, it's 10:30 PM in Tehran.
Does Phoenix or Tehran change clocks for Daylight Saving Time?
No, Phoenix does not observe DST — it stays on MST 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).
Related Time Zone Conversions
More from Phoenix
Convert to Tehran
Working across time zones?
Auto-sync calendar events into your timesheet — no matter what time zone your team is in. Connect Google Calendar, Teams, or Zoom and export a polished timesheet in seconds.
No credit card required. Free forever plan available.