Houston to Tehran Time Difference
🇺🇸 Houston is currently 8.5 hours ahead of 🇮🇷 Tehran. This difference varies between 8.5h and 9.5h due to Daylight Saving Time.
Live Calculator
Atin 🇺🇸 Houston→it will be—in 🇮🇷 Tehran
Open full calculator →DST-accurate · shareable link
Difference
+8.5h
Business overlap
None
Distance
11,950 km
Approx. flight
14.1h
Hour-by-Hour: Houston to Tehran
| 🇺🇸 Houston | 🇮🇷 Tehran | Note |
|---|---|---|
| 12:00 AM | 8:30 AM | |
| 1:00 AM | 9:30 AM | |
| 2:00 AM | 10:30 AM | |
| 3:00 AM | 11:30 AM | |
| 4:00 AM | 12:30 PM | |
| 5:00 AM | 1:30 PM | |
| 6:00 AM | 2:30 PM | |
| 7:00 AM | 3:30 PM | |
| 8:00 AM | 4:30 PM | |
| 9:00 AM | 5:30 PM | |
| 10:00 AM | 6:30 PM | |
| 11:00 AM | 7:30 PM | |
| 12:00 PM | 8:30 PM | |
| 1:00 PM | 9:30 PM | |
| 2:00 PM | 10:30 PM | |
| 3:00 PM | 11:30 PM | |
| 4:00 PM | 12:30 AM(next day) | Next day |
| 5:00 PM | 1:30 AM(next day) | Next day |
| 6:00 PM | 2:30 AM(next day) | Next day |
| 7:00 PM | 3:30 AM(next day) | Next day |
| 8:00 PM | 4:30 AM(next day) | Next day |
| 9:00 PM | 5:30 AM(next day) | Next day |
| 10:00 PM | 6:30 AM(next day) | Next day |
| 11:00 PM | 7:30 AM(next day) | Next day |
Daylight Saving Time (DST)
Houston observes Daylight Saving Time, while Tehran does not. This causes the time difference to shift between 8.5 hours ahead and 9.5 hours ahead depending on the season. Currently, Houston is 8.5 hours ahead relative to Tehran.
Min difference
8.5h
Max difference
9.5h
Best Meeting Times
There is no overlap between standard business hours (9 AM – 6 PM) in Houston and Tehran. Consider scheduling early morning or late evening calls to bridge the gap.
Frequently Asked Questions
What is the time difference between Houston and Tehran?
The time difference between Houston and Tehran is currently 8.5 hours ahead. Houston uses CDT (UTC-5), while Tehran uses GMT+3:30 (UTC+3:30). This difference varies seasonally due to Daylight Saving Time, ranging from 8.5 hours ahead to 9.5 hours ahead.
When it's noon in Houston, what time is it in Tehran?
When it's 12:00 PM (noon) in Houston, it is 8:30 PM in Tehran. Use our calculator above to convert any other time.
Does the time difference between Houston and Tehran change?
Yes, the time difference changes throughout the year. Because Houston observes Daylight Saving Time, the offset shifts between 8.5 hours ahead and 9.5 hours ahead at different times of the year.
What are the best times to schedule a call between Houston and Tehran?
There is no overlap between standard business hours (9 AM – 6 PM) in Houston and Tehran. Consider scheduling early morning in one city or late evening in the other to find a mutually reasonable time.
Is Houston ahead or behind Tehran?
Houston is currently 8.5 hours behind Tehran.
What time zone is Houston in?
Houston is in the America/Chicago time zone, currently using CDT (UTC-5). Houston observes Daylight Saving Time, so the offset changes twice a year.
What time is midnight in Houston in Tehran?
When it is midnight (12:00 AM) in Houston, it is 8:30 AM in Tehran.