Iran to COT
-8h 30mIran
IRSTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and COT on the World Map
The map below highlights the IRST (Iran Standard Time) and COT (Colombia Time) timezone regions across the globe.
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.
COT – Colombia Time
UTC-05:00Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.
- •Colombia does not observe daylight saving time.
- •COT is the same offset as EST (UTC-05:00).
- •Bogotá sits at 2,640m elevation, making it one of the highest capital cities.
Time Conversion Guide: Iran to COT
Iran runs on Iran Standard Time (IRST) at UTC+03:30. COT runs on Colombia Time (COT) at UTC-05:00. That puts Iran 8 hours 30 minutes behind COT — a difference of -8h 30m at the current offsets.
In practice, when it is 9:00 AM in Iran it is 12:30 AM in COT. Midnight in Iran is 3:30 PM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Iran to COT time conversion table
| Iran (IRST) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 3:30 PM | previous day |
| 6:00 AM | 9:30 PM | previous day |
| 7:00 AM | 10:30 PM | previous day |
| 8:00 AM | 11:30 PM | previous day |
| 9:00 AM | 12:30 AM | same day |
| 12:00 PM | 3:30 AM | same day |
| 3:00 PM | 6:30 AM | same day |
| 5:00 PM | 8:30 AM | same day |
| 6:00 PM | 9:30 AM | same day |
| 9:00 PM | 12:30 PM | same day |
Why people convert Iran to COT time
- Scheduling a call from Iran to COT: a 10:00 AM start in Iran lands at 1:30 AM in COT, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -8h 30m gap: Iran and COT 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 COT is 12:30 AM in Iran.
- Watching a live event or market open: Iran viewers need 12:30 AM in COT to catch a 9:00 AM start there, and 8:30 AM if the event is anchored to Iran.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a -8h 30m gap is not.
- With a -8h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week Iran takes the early slot, the next week COT does.
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.
About COT (Colombia Time)
Colombia Time (COT) is used throughout Colombia. Colombia does not observe daylight saving time. COT shares the same offset as EST (UTC-05:00). Bogotá, the capital, is one of the largest cities in South America.
Best time to call between Iran and COT
With a -8h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. COT opens at 9:00 AM COT, which is 12:30 AM in Iran, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Iran and COT have no shared working hours because of the -8h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
Iran is 8 hours 30 minutes behind COT (IRST UTC+03:30 → COT UTC-05:00). 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 Iran and COT?
Iran (IRST, UTC+03:30) is 8 hours 30 minutes behind COT (COT, UTC-05:00). The gap is currently -8h 30m.
How do I convert Iran time to COT time?
Add -8h 30m to Iran local time. For example, 9:00 AM in Iran is 12:30 AM in COT.
What time is it in COT right now?
COT uses COT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -8h 30m offset from Iran.
What is the best time to call COT from Iran?
There is no shared working-hours window because of the -8h 30m gap. The closest option is 1:00 PM in Iran, which is 4:30 AM in COT.
Which is behind, Iran or COT?
Iran is 8 hours 30 minutes behind COT. When it is 12:00 PM in Iran it is 3:30 AM in COT.
Do Iran and COT use different time zones?
Iran (Iran) uses IRST at UTC+03:30, while COT uses COT at UTC-05:00. The IANA identifiers are Asia/Tehran and America/Bogota.
Does daylight saving time affect the Iran–COT difference?
Neither zone observes daylight saving time, so the -8h 30m offset between Iran and COT is fixed all year.
Which other cities share Iran's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, Iran's zone?
IRST is used in Iran.
Is there a day difference between Iran and COT?
Not normally. The -8h 30m gap only pushes the date over the previous day.
What is the time difference between Iran and COT?
COT is -8h 30m from Iran.
What timezone is Iran in?
Iran operates on its local timezone.
What timezone is COT in?
COT operates on its local timezone.
Which countries use IRST (Iran Standard Time)?
IRST is used in Iran.
Does IRST observe daylight saving time?
Yes, IRST switches to IRDT during summer months.
What are some interesting facts about IRST?
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).
Which cities are in the COT timezone?
Major cities in the COT timezone include Bogotá, Medellín, Cali, Barranquilla, Cartagena.
What is the UTC offset for COT?
Colombia Time (COT) is at UTC-05:00.
What should I know about the COT timezone?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
When is it midnight in Iran, what time is it in COT?
When it is 12:00 AM (midnight) in Iran (IRST), it is -8h 30m later in COT (COT).
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