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).

CLT to COT

-1h

CLT

CLTSOURCE

UTC-03:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

COT

UTC-05:00

HH11

MM00

11:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

CLT

COT

12:00 AM

10:00 PM-1

2:00 AM

12:00 AM

4:00 AM

2:00 AM

6:00 AM

4:00 AM

8:00 AM

6:00 AM

10:00 AM

8:00 AM

12:00 PM

10:00 AM

2:00 PM

12:00 PM

4:00 PM

2:00 PM

6:00 PM

4:00 PM

8:00 PM

6:00 PM

10:00 PM

8:00 PM

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

CLT and COT on the World Map

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

CLT Zone

→

COT Zone

Explore all world timezones interactively →

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

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

Comparing Time Zones: CLT and COT

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

In practice, when it is 9:00 AM in CLT it is 8:00 AM in COT. Midnight in CLT is 11:00 PM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

CLT to COT time conversion table

CLT (CLT)	COT (COT)	Day
12:00 AM	11:00 PM	previous day
6:00 AM	5:00 AM	same day
7:00 AM	6:00 AM	same day
8:00 AM	7:00 AM	same day
9:00 AM	8:00 AM	same day
12:00 PM	11:00 AM	same day
3:00 PM	2:00 PM	same day
5:00 PM	4:00 PM	same day
6:00 PM	5:00 PM	same day
9:00 PM	8:00 PM	same day

Why people convert CLT to COT time

Scheduling a call from CLT to COT: a 10:00 AM start in CLT lands at 9:00 AM in COT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both CLT and COT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM CLT time (9:00 AM–4:00 PM COT). That is roughly 7 hours of usable overlap.
Booking travel or deliveries: tracking COT local time against CLT keeps pickup windows and arrival estimates honest across the -1h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM CLT" is unambiguous; "3 PM" across a -1h gap is not.
Block 10:00 AM–5:00 PM CLT as the recurring meeting window if you work primarily from CLT and need COT colleagues present.

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.

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 CLT and COT

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

Business hours overlap

CLT and COT share 7 hours of working-hours overlap (10:00 AM–5:00 PM CLT), so scheduling a live meeting is straightforward.

CLT is 1 hour behind COT (CLT UTC-04:00 → COT UTC-05:00). The shared working window is 10:00 AM–5:00 PM CLT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

CLT

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

COT

Does not observe DST

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 CLT and COT?

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

How do I convert CLT time to COT time?

Add -1h to CLT local time. For example, 9:00 AM in CLT is 8:00 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 -1h offset from CLT.

What is the best time to call COT from CLT?

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

Which is behind, CLT or COT?

CLT is 1 hour behind COT. When it is 12:00 PM in CLT it is 11:00 AM in COT.

Does daylight saving time affect the CLT–COT difference?

Neither zone observes daylight saving time, so the -1h offset between CLT and COT is fixed all year.

Which other cities share CLT's time zone?

CLT also covers Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.

Which countries use CLT, CLT's zone?

CLT is used in Chile.

Is there a day difference between CLT and COT?

Not normally. The -1h gap only pushes the date over the previous day.

What is the time difference between CLT and COT?

COT is -1h from CLT.

What timezone is CLT in?

CLT operates on its local timezone.

What timezone is COT in?

COT operates on its local timezone.

Which countries use CLT (Chile Standard Time)?

CLT is used in Chile.

Does CLT observe daylight saving time?

Yes, CLT switches to CLST during summer months.

What are some interesting 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.