COT to IST
+10h 30mCOT
COTSOURCEIST
ISTGreen rows indicate typical business hours (9 AM - 5 PM)
COT and IST on the World Map
The map below highlights the COT (Colombia Time) and IST (India Standard Time) timezone regions across the globe.
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.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
COT vs IST: Offsets, DST and Best Call Times
COT runs on Colombia Time (COT) at UTC-05:00. IST runs on India Standard Time (IST) at UTC+05:30. That puts COT 10 hours 30 minutes ahead of IST — a difference of +10h 30m at the current offsets.
In practice, when it is 9:00 AM in COT it is 7:30 PM in IST. Midnight in COT is 10:30 AM in IST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
COT to IST time conversion table
| COT (COT) | IST (IST) | Day |
|---|---|---|
| 12:00 AM | 10:30 AM | same day |
| 6:00 AM | 4:30 PM | same day |
| 7:00 AM | 5:30 PM | same day |
| 8:00 AM | 6:30 PM | same day |
| 9:00 AM | 7:30 PM | same day |
| 12:00 PM | 10:30 PM | same day |
| 3:00 PM | 1:30 AM | next day |
| 5:00 PM | 3:30 AM | next day |
| 6:00 PM | 4:30 AM | next day |
| 9:00 PM | 7:30 AM | next day |
Why people convert COT to IST time
- Scheduling a call from COT to IST: a 10:00 AM start in COT lands at 8:30 PM in IST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +10h 30m gap: COT and IST 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 IST is 7:30 PM in COT.
- Coordinating a COT-based team with IST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM COT" is unambiguous; "3 PM" across a +10h 30m gap is not.
- With a +10h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week COT takes the early slot, the next week IST does.
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.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
Best time to call between COT and IST
With a +10h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. IST opens at 9:00 AM IST, which is 7:30 PM in COT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
COT and IST have no shared working hours because of the +10h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
COT is 10 hours 30 minutes ahead of IST (COT UTC-05:00 → IST UTC+05:30). 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 COT and IST?
COT (COT, UTC-05:00) is 10 hours 30 minutes ahead of IST (IST, UTC+05:30). The gap is currently +10h 30m.
How do I convert COT time to IST time?
Add +10h 30m to COT local time. For example, 9:00 AM in COT is 7:30 PM in IST.
What time is it in IST right now?
IST uses IST at UTC+05:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +10h 30m offset from COT.
What is the best time to call IST from COT?
There is no shared working-hours window because of the +10h 30m gap. The closest option is 1:00 PM in COT, which is 11:30 PM in IST.
Which is ahead, COT or IST?
COT is 10 hours 30 minutes ahead of IST. When it is 12:00 PM in COT it is 10:30 PM in IST.
Does daylight saving time affect the COT–IST difference?
Neither zone observes daylight saving time, so the +10h 30m offset between COT and IST is fixed all year.
Which other cities share COT's time zone?
COT also covers Bogotá, Medellín, Cali, Barranquilla, Cartagena.
Which countries use COT, COT's zone?
COT is used in Colombia.
Is there a day difference between COT and IST?
Not normally. The +10h 30m gap only pushes the date over for late-evening times.
What is the time difference between COT and IST?
IST is +10h 30m from COT.
What timezone is COT in?
COT operates on its local timezone.
What timezone is IST in?
IST operates on its local timezone.
Which countries use COT (Colombia Time)?
COT is used in Colombia.
Does COT observe daylight saving time?
No, COT does not observe daylight saving time and remains at UTC-05:00 year-round.
What are some interesting facts about COT?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
Which cities are in the IST timezone?
Major cities in the IST timezone include Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad.
What is the UTC offset for IST?
India Standard Time (IST) is at UTC+05:30.
What should I know about the IST timezone?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
When is it midnight in COT, what time is it in IST?
When it is 12:00 AM (midnight) in COT (COT), it is +10h 30m later in IST (IST).
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See every conversion from COT →·See every conversion from IST →