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).

EDT to COT

-1h

EDT

EDTSOURCE

UTC-04:00☀ 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

EDT

COT

12:00 AM

11:00 PM-1

2:00 AM

1:00 AM

4:00 AM

3:00 AM

6:00 AM

5:00 AM

8:00 AM

7:00 AM

10:00 AM

9:00 AM

12:00 PM

11:00 AM

2:00 PM

1:00 PM

4:00 PM

3:00 PM

6:00 PM

5:00 PM

8:00 PM

7:00 PM

10:00 PM

9:00 PM

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

EDT and COT on the World Map

The map below highlights the EDT (Eastern Daylight Time) and COT (Colombia Time) timezone regions across the globe.

EDT Zone

→

COT Zone

Explore all world timezones interactively →

EDT – Eastern Daylight Time

UTC-04:00

Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.

Countries in EDT

United States (Eastern)Canada (Ontario, Quebec)BahamasHaitiTurks and Caicos

Major Cities in EDT

New York CityWashington D.C.TorontoMiamiPhiladelphiaAtlantaBostonMontreal

Key Facts about EDT

•EDT is observed from the second Sunday of March to the first Sunday of November.
•During EDT, the US East Coast is only 4 hours behind London (instead of 5).
•Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.

Daylight Saving:Yes – switches to EST

Learn more about EDT 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

EDT to COT Time Difference – Complete Guide

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

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

EDT to COT time conversion table

EDT (EDT)	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 EDT to COT time

Scheduling a call from EDT to COT: a 10:00 AM start in EDT lands at 9:00 AM in COT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both EDT and COT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM EDT time (9:00 AM–4:00 PM COT). That is roughly 7 hours of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in EDT is 7:00 PM in COT makes it easy to avoid calling at 3 AM.

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

About EDT (Eastern Daylight Time)

Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.

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 EDT and COT

Both EDT and COT sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM EDT, 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

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

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

🕐 Daylight Saving Time Info

EDT

☀ Currently in DST

Standard: UTC-05:00 · DST: UTC-04:00

Clocks fall back on Sun, Nov 1, 2026

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 EDT and COT?

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

How do I convert EDT time to COT time?

Add -1h to EDT local time. For example, 9:00 AM in EDT 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 EDT.

What is the best time to call COT from EDT?

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

Which is behind, EDT or COT?

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

Does daylight saving time affect the EDT–COT difference?

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

Which other cities share EDT's time zone?

EDT also covers New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.

Which countries use EDT, EDT's zone?

EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.

Is there a day difference between EDT and COT?

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

What is the time difference between EDT and COT?

COT is -1h from EDT.

What timezone is EDT in?

EDT operates on its local timezone.

What timezone is COT in?

COT operates on its local timezone.

Which countries use EDT (Eastern Daylight Time)?

EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.

Does EDT observe daylight saving time?

Yes, EDT switches to EST during summer months.

What are some interesting facts about EDT?

EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).