CST to Tehran Time Converter
IRST is 9 hours 30 minutes ahead of CST. 9:00 AM CST = 6:30 PM IRST.
IRST is 9 hours 30 minutes ahead of CST at the moment. To convert CST to Tehran Time, add 9 hours 30 minutes to the CST time: 9:00 AM CST = 6:30 PM IRST.
CST (Central Time) is used in Chicago, Dallas, Houston, Minneapolis, New Orleans, Winnipeg; Mexico City and Central America use UTC−6 all year. Tehran Time (Tehran time) is used in Tehran, Iran.
CST here means North American Central Standard Time, not China Standard Time.
CST to Tehran Time time conversion table
CST to Tehran Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| CST | Tehran Time |
|---|---|
| 12:00 AM | 9:30 AM |
| 1:00 AM | 10:30 AM |
| 2:00 AM | 11:30 AM |
| 3:00 AM | 12:30 PM |
| 4:00 AM | 1:30 PM |
| 5:00 AM | 2:30 PM |
| 6:00 AM | 3:30 PM |
| 7:00 AM | 4:30 PM |
| CST | Tehran Time |
|---|---|
| 8:00 AM | 5:30 PM |
| 9:00 AM | 6:30 PM |
| 10:00 AM | 7:30 PM |
| 11:00 AM | 8:30 PM |
| 12:00 PM | 9:30 PM |
| 1:00 PM | 10:30 PM |
| 2:00 PM | 11:30 PM |
| 3:00 PM | 12:30 AM+1 |
| CST | Tehran Time |
|---|---|
| 4:00 PM | 1:30 AM+1 |
| 5:00 PM | 2:30 AM+1 |
| 6:00 PM | 3:30 AM+1 |
| 7:00 PM | 4:30 AM+1 |
| 8:00 PM | 5:30 AM+1 |
| 9:00 PM | 6:30 AM+1 |
| 10:00 PM | 7:30 AM+1 |
| 11:00 PM | 8:30 AM+1 |
Conversion table from CST to Tehran Time for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in Tehran Time, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert CST to Tehran Time
Add 9 hours 30 minutes to the CST time to get Tehran Time.
Example: 9:00 AM CST = 6:30 PM IRST.
Across midnight: 10:00 PM CST = 7:30 AM IRST (next day). The date changes, so always check the day as well as the hour.
Time difference between CST and Tehran Time
The time difference between CST and Tehran Time is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 7 Mar 2026: Tehran Time is 9 hours 30 minutes ahead of CST.
- 8 Mar 2026 – 31 Oct 2026: Tehran Time is 8 hours 30 minutes ahead of CST.
- 1 Nov 2026 – 30 Dec 2026: Tehran Time is 9 hours 30 minutes ahead of CST.
CST and Tehran Time during daylight saving time
- CST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from CST (UTC−6) to CDT (UTC−5).
- Tehran Time does not observe daylight saving time; it stays on UTC+3:30 all year.
Best time for a meeting between CST and Tehran Time
CST and Tehran Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM CST, which is 4:30 PM IRST.
CST to Tehran Time FAQ
What is the time difference between CST and Tehran Time?
Right now IRST is 9 hours 30 minutes ahead of CST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM CST in Tehran Time?
9:00 AM CST is 6:30 PM IRST.
What is 12 PM (noon) CST in Tehran Time?
12:00 PM CST is 9:30 PM IRST.
Is Tehran Time ahead of or behind CST?
IRST is 9 hours 30 minutes ahead of CST, so it is later in Tehran Time than in CST.
Does CST change for daylight saving time?
Yes. CST next changes on 14 Mar 2027, when clocks go forward one hour from CST to CDT.
Does Tehran Time change for daylight saving time?
No. Tehran Time stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between CST and Tehran Time?
CST and Tehran Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM CST, which is 4:30 PM IRST.
Is CT the same as CST?
CST is the winter (standard) name of Central Time (CT). From March to November the same clocks are called CDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert Tehran Time to CST
Convert CST to other time zones
Convert other time zones to Tehran Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.