Mexico to Iran
+9h 30mMexico
CSTSOURCEIran
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
CST and IRST on the World Map
The map below highlights the CST (Central Standard Time) and IRST (Iran Standard Time) timezone regions across the globe.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •IRST is one of only a few time zones with a 30-minute offset.
- •Iran observes daylight saving time, switching to IRDT (UTC+04:30).
- •Tehran has a metropolitan population of over 16 million.
Comparing Time Zones: Mexico and Iran
Mexico runs on Central Standard Time (CST) at UTC-06:00. Iran runs on Iran Standard Time (IRST) at UTC+03:30. That puts Mexico 9 hours 30 minutes ahead of Iran — a difference of +9h 30m at the current offsets.
In practice, when it is 9:00 AM in Mexico it is 6:30 PM in Iran. Midnight in Mexico is 9:30 AM in Iran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Mexico to Iran time conversion table
| Mexico (CST) | Iran (IRST) | Day |
|---|---|---|
| 12:00 AM | 9:30 AM | same day |
| 6:00 AM | 3:30 PM | same day |
| 7:00 AM | 4:30 PM | same day |
| 8:00 AM | 5:30 PM | same day |
| 9:00 AM | 6:30 PM | same day |
| 12:00 PM | 9:30 PM | same day |
| 3:00 PM | 12:30 AM | next day |
| 5:00 PM | 2:30 AM | next day |
| 6:00 PM | 3:30 AM | next day |
| 9:00 PM | 6:30 AM | next day |
Why people convert Mexico to Iran time
- Scheduling a call from Mexico to Iran: a 10:00 AM start in Mexico lands at 7:30 PM in Iran, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +9h 30m gap: Mexico and Iran have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Iran is 6:30 PM in Mexico.
- Watching a live event or market open: Mexico viewers need 6:30 PM in Iran to catch a 9:00 AM start there, and 2:30 PM if the event is anchored to Mexico.
- Always state the zone abbreviation, not just the hour. "3:00 PM CST" is unambiguous; "3 PM" across a +9h 30m gap is not.
- With a +9h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week Mexico takes the early slot, the next week Iran does.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
About IRST (Iran Standard Time)
Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.
Best time to call between Mexico and Iran
With a +9h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Iran opens at 9:00 AM IRST, which is 6:30 PM in Mexico, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Mexico and Iran have no shared working hours because of the +9h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
Mexico is 9 hours 30 minutes ahead of Iran (CST UTC-06:00 → IRST UTC+03:30). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Mexico and Iran?
Mexico (CST, UTC-06:00) is 9 hours 30 minutes ahead of Iran (IRST, UTC+03:30). The gap is currently +9h 30m.
How do I convert Mexico time to Iran time?
Add +9h 30m to Mexico local time. For example, 9:00 AM in Mexico is 6:30 PM in Iran.
What time is it in Iran right now?
Iran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +9h 30m offset from Mexico.
What is the best time to call Iran from Mexico?
There is no shared working-hours window because of the +9h 30m gap. The closest option is 1:00 PM in Mexico, which is 10:30 PM in Iran.
Which is ahead, Mexico or Iran?
Mexico is 9 hours 30 minutes ahead of Iran. When it is 12:00 PM in Mexico it is 9:30 PM in Iran.
Do Mexico and Iran use different time zones?
Mexico (Mexico) uses CST at UTC-06:00, while Iran (Iran) uses IRST at UTC+03:30. The IANA identifiers are America/Mexico_City and Asia/Tehran.
Does daylight saving time affect the Mexico–Iran difference?
Neither zone observes daylight saving time, so the +9h 30m offset between Mexico and Iran is fixed all year.
Which other cities share Mexico's time zone?
CST also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.
Which countries use CST, Mexico's zone?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.
Is there a day difference between Mexico and Iran?
Not normally. The +9h 30m gap only pushes the date over for late-evening times.
What is the time difference between Mexico and Iran?
Iran is +9h 30m from Mexico.
What timezone is Mexico in?
Mexico operates on its local timezone.
What timezone is Iran in?
Iran operates on its local timezone.
Which countries use CST (Central Standard Time)?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.
Does CST observe daylight saving time?
Yes, CST switches to CDT during summer months.
What are some interesting facts about CST?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
Which cities are in the IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
IRST is one of only a few time zones with a 30-minute offset. Iran observes daylight saving time, switching to IRDT (UTC+04:30).
When is it midnight in Mexico, what time is it in Iran?
When it is 12:00 AM (midnight) in Mexico (CST), it is +9h 30m later in Iran (IRST).
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