Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

COT to Sri Lanka

+10h 30m

COT

COTSOURCE

UTC-05:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Sri Lanka

IST

UTC+05:30

HH10

MM30

22:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

COT

Sri Lanka

12:00 AM

10:30 AM

2:00 AM

12:30 PM

4:00 AM

2:30 PM

6:00 AM

4:30 PM

8:00 AM

6:30 PM

10:00 AM

8:30 PM

12:00 PM

10:30 PM

2:00 PM

12:30 AM+1

4:00 PM

2:30 AM+1

6:00 PM

4:30 AM+1

8:00 PM

6:30 AM+1

10:00 PM

8:30 AM+1

Green 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 Zone

→

IST Zone

Explore all world timezones interactively →

COT – Colombia Time

UTC-05:00

Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.

Countries in COT

Colombia

Major Cities in COT

BogotáMedellínCaliBarranquillaCartagena

Key Facts about COT

•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.

Daylight Saving:No – UTC-05:00 year-round

Learn more about COT on Wikipedia

IST – India Standard Time

UTC+05:30

India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.

Countries in IST

IndiaSri Lanka

Major Cities in IST

MumbaiDelhiBangaloreKolkataChennaiHyderabadPuneAhmedabadColomboJaipurLucknowSurat

Key Facts about IST

•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.

Daylight Saving:No – UTC+05:30 year-round

Learn more about IST on Wikipedia

Understanding the +10h 30m Gap: COT vs Sri Lanka

COT runs on Colombia Time (COT) at UTC-05:00. Sri Lanka runs on India Standard Time (IST) at UTC+05:30. That puts COT 10 hours 30 minutes ahead of Sri Lanka — 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 Sri Lanka. Midnight in COT is 10:30 AM in Sri Lanka. Neither zone observes daylight saving time, so the offset between them stays constant all year.

COT to Sri Lanka time conversion table

COT (COT)	Sri Lanka (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 Sri Lanka time

Scheduling a call from COT to Sri Lanka: a 10:00 AM start in COT lands at 8:30 PM in Sri Lanka, so you can confirm the slot without doing the arithmetic yourself.
Handling a +10h 30m gap: COT and Sri Lanka 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 Sri Lanka is 7:30 PM in COT.
Watching a live event or market open: COT viewers need 7:30 PM in Sri Lanka to catch a 9:00 AM start there, and 1:30 PM if the event is anchored to COT.

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 Sri Lanka 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 Sri Lanka

With a +10h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Sri Lanka 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 Sri Lanka 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 Sri Lanka (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:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between COT and Sri Lanka?

COT (COT, UTC-05:00) is 10 hours 30 minutes ahead of Sri Lanka (IST, UTC+05:30). The gap is currently +10h 30m.

How do I convert COT time to Sri Lanka time?

Add +10h 30m to COT local time. For example, 9:00 AM in COT is 7:30 PM in Sri Lanka.

What time is it in Sri Lanka right now?

Sri Lanka 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.