Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

COT to CLT

+1h

COT

COTSOURCE

UTC-05:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

CLT

UTC-03:00☀ DST active

HH01

MM00

13:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

COT

CLT

12:00 AM

2:00 AM

4:00 AM

6:00 AM

8:00 AM

10:00 AM

12:00 PM

2:00 PM

4:00 PM

6:00 PM

8:00 PM

10:00 PM

12:00 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

COT and CLT on the World Map

The map below highlights the COT (Colombia Time) and CLT (Chile Standard Time) timezone regions across the globe.

COT Zone

→

CLT 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

CLT – Chile Standard Time

UTC-04:00

Chile Standard Time (CLT) is the time zone for continental Chile, 4 hours behind UTC.

Countries in CLT

Chile

Major Cities in CLT

SantiagoValparaísoConcepciónViña del MarAntofagasta

Key Facts about CLT

•Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer.
•Santiago is the largest city in Chile with over 6 million in the metro area.
•Chile spans over 4,300 km from north to south but uses one timezone.

Daylight Saving:Yes – switches to CLST

Learn more about CLT on Wikipedia

Everything You Need to Know About COT and CLT Time

COT runs on Colombia Time (COT) at UTC-05:00. CLT runs on Chile Standard Time (CLT) at UTC-04:00. That puts COT 1 hour ahead of CLT — a difference of +1h at the current offsets.

In practice, when it is 9:00 AM in COT it is 10:00 AM in CLT. Midnight in COT is 1:00 AM in CLT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

COT to CLT time conversion table

COT (COT)	CLT (CLT)	Day
12:00 AM	1:00 AM	same day
6:00 AM	7:00 AM	same day
7:00 AM	8:00 AM	same day
8:00 AM	9:00 AM	same day
9:00 AM	10:00 AM	same day
12:00 PM	1:00 PM	same day
3:00 PM	4:00 PM	same day
5:00 PM	6:00 PM	same day
6:00 PM	7:00 PM	same day
9:00 PM	10:00 PM	same day

Why people convert COT to CLT time

Scheduling a call from COT to CLT: a 10:00 AM start in COT lands at 11:00 AM in CLT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both COT and CLT are inside the 9-to-5 working day between 9:00 AM and 4:00 PM COT time (10:00 AM–5:00 PM CLT). That is roughly 7 hours of usable overlap.
Coordinating a COT-based team with CLT 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 +1h gap is not.
Block 9:00 AM–4:00 PM COT as the recurring meeting window if you work primarily from COT and need CLT colleagues present.

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 CLT (Chile Standard Time)

Chile Standard Time (CLT) is the standard time in Chile. During summer months (October to March), Chile switches to Chile Summer Time (CLST, UTC-03:00). Chile is the longest north-south country in the world.

Best time to call between COT and CLT

Both COT and CLT sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM COT, which is 10:00 AM–5:00 PM CLT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

COT and CLT share 7 hours of working-hours overlap (9:00 AM–4:00 PM COT), so scheduling a live meeting is straightforward.

COT is 1 hour ahead of CLT (COT UTC-05:00 → CLT UTC-04:00). The shared working window is 9:00 AM–4:00 PM COT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

COT

Does not observe DST

CLT

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

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 CLT?

COT (COT, UTC-05:00) is 1 hour ahead of CLT (CLT, UTC-04:00). The gap is currently +1h.

How do I convert COT time to CLT time?

Add +1h to COT local time. For example, 9:00 AM in COT is 10:00 AM in CLT.

What time is it in CLT right now?

CLT uses CLT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from COT.

What is the best time to call CLT from COT?

Call between 9:00 AM and 4:00 PM COT — that maps to 10:00 AM–5:00 PM CLT and keeps both parties inside the working day.

Which is ahead, COT or CLT?

COT is 1 hour ahead of CLT. When it is 12:00 PM in COT it is 1:00 PM in CLT.

Does daylight saving time affect the COT–CLT difference?

Neither zone observes daylight saving time, so the +1h offset between COT and CLT 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 CLT?

Not normally. The +1h gap only pushes the date over for late-evening times.

What is the time difference between COT and CLT?

CLT is +1h from COT.

What timezone is COT in?

COT operates on its local timezone.

What timezone is CLT in?

CLT 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 CLT timezone?

Major cities in the CLT timezone include Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.

What is the UTC offset for CLT?

Chile Standard Time (CLT) is at UTC-04:00. During daylight saving time, it shifts to CLST.

What should I know about the CLT timezone?

Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer. Santiago is the largest city in Chile with over 6 million in the metro area.