World Timezones

COT to AST-ATLANTIC Converter

Compare AST-ATLANTIC to COT instead
Colombia Time11:35 pmThu, Jun 4
Colombia TimeCOT
South America · UTC-5
11:35 pmThu, Jun 4
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Atlantic TimeADT
North America · UTC-3
1:35 amFri, Jun 5
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a

Offset

The time difference between Colombia Time and Atlantic Time is 2 hours.

2 hours

Colombia Time (COT) is behind Atlantic Time (ADT).

COT: UTC-5

ADT: UTC-3

Atlantic Time is currently observing daylight saving time; Colombia Time is not.

When to schedule

Business-hours overlap: 9 AM–3 PM in Colombia Time (11 AM–5 PM in Atlantic Time).

Both teams are in working hours during this window on weekdays.

Suggested time: 12:00 PM Colombia Time (2:00 PM Atlantic Time).

This window may shift by an hour during daylight saving time.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

Colombia

  • New Year's DayThu, Jan 1
  • EpiphanyMon, Jan 12
  • Saint Joseph's DayMon, Mar 23
  • Maundy ThursdayThu, Apr 2
  • Good FridayFri, Apr 3
  • Labour DayFri, May 1
  • Ascension DayMon, May 18
  • Corpus ChristiMon, Jun 8
  • Sacred HeartMon, Jun 15
  • Saint Peter and Saint PaulMon, Jun 29
  • Declaration of IndependenceMon, Jul 20
  • Battle of BoyacáFri, Aug 7
  • Assumption of MaryMon, Aug 17
  • Columbus DayMon, Oct 12
  • All Saints’ DayMon, Nov 2
  • Independence of CartagenaMon, Nov 16
  • Immaculate ConceptionTue, Dec 8
  • Christmas DayFri, Dec 25

Canada

  • New Year's DayThu, Jan 1
  • Good FridayFri, Apr 3
  • Victoria DayMon, May 18
  • Canada DayWed, Jul 1
  • Labour DayMon, Sep 7
  • National Day for Truth and ReconciliationWed, Sep 30
  • ThanksgivingMon, Oct 12
  • Christmas DayFri, Dec 25

About these zones

Colombia Time is also known as COT. To call Colombia, dial +57.

Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.

Atlantic Time is approximately 2,850 miles north of Colombia Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

COTAST-ATLANTICDay
12:00 am2:00 amSame day
1:00 am3:00 amSame day
2:00 am4:00 amSame day
3:00 am5:00 amSame day
4:00 am6:00 amSame day
5:00 am7:00 amSame day
6:00 am8:00 amSame day
7:00 am9:00 amSame day
8:00 am10:00 amSame day
9:00 am11:00 amSame day
10:00 am12:00 pmSame day
11:00 am1:00 pmSame day
12:00 pm2:00 pmSame day
1:00 pm3:00 pmSame day
2:00 pm4:00 pmSame day
3:00 pm5:00 pmSame day
4:00 pm6:00 pmSame day
5:00 pm7:00 pmSame day
6:00 pm8:00 pmSame day
7:00 pm9:00 pmSame day
8:00 pm10:00 pmSame day
9:00 pm11:00 pmSame day
10:00 pm12:00 am+1 day
11:00 pm1:00 am+1 day

Daylight saving time

Atlantic Time observes daylight saving time; Colombia Time does not. The offset between the two zones changes when Atlantic Time transitions: on Sunday, November 1, 2026, clocks fall back from ADT to AST.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Colombia Time
Sunrise
5:44 AM
Sunset
6:07 PM
Day length
12h 23m
Atlantic Time
Sunrise
5:31 AM
Sunset
8:56 PM
Day length
15h 25m

Cities in these zones

Cities in Colombia Time

Cities in Atlantic Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Colombia Time

  • BOG
  • CLO
  • EOH
  • MDE

Airports in Atlantic Time

  • YHZ

Related conversions

Common conversions

What is 9:00 am COT in AST-ATLANTIC?
9:00 am COT is 11:00 am AST-ATLANTIC.
What is 12:00 pm COT in AST-ATLANTIC?
12:00 pm COT is 2:00 pm AST-ATLANTIC.
What is 12:30 pm COT in AST-ATLANTIC?
12:30 pm COT is 2:30 pm AST-ATLANTIC.
What is 2:00 pm COT in AST-ATLANTIC?
2:00 pm COT is 4:00 pm AST-ATLANTIC.
What is 5:00 pm COT in AST-ATLANTIC?
5:00 pm COT is 7:00 pm AST-ATLANTIC.
What is 11:30 pm COT in AST-ATLANTIC?
11:30 pm COT is 1:30 am AST-ATLANTIC, the next day.