COT to AEDT
+16hCOT
COTSOURCEAEDT
AEDTGreen rows indicate typical business hours (9 AM - 5 PM)
COT and AEDT on the World Map
The map below highlights the COT (Colombia Time) and AEDT (Australian Eastern Daylight Time) timezone regions across the globe.
COT – Colombia Time
UTC-05:00Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.
- •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.
AEDT – Australian Eastern Daylight Time
UTC+11:00Australian Eastern Daylight Time (AEDT, UTC+11:00) is the daylight saving period in south-eastern Australia, from October to April.
- •AEDT runs from the first Sunday in October to the first Sunday in April.
- •AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
- •Queensland does not observe daylight saving, so Brisbane stays on AEST.
- •During AEDT, Sydney is 16 hours ahead of New York and 11 hours ahead of UTC.
Time Conversion Guide: COT to AEDT
COT runs on Colombia Time (COT) at UTC-05:00. AEDT runs on Australian Eastern Daylight Time (AEDT) at UTC+11:00. That puts COT 16 hours ahead of AEDT — a difference of +16h at the current offsets.
In practice, when it is 9:00 AM in COT it is 1:00 AM in AEDT on the next day. Midnight in COT is 4:00 PM in AEDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
COT to AEDT time conversion table
| COT (COT) | AEDT (AEDT) | Day |
|---|---|---|
| 12:00 AM | 4:00 PM | same day |
| 6:00 AM | 10:00 PM | same day |
| 7:00 AM | 11:00 PM | same day |
| 8:00 AM | 12:00 AM | next day |
| 9:00 AM | 1:00 AM | next day |
| 12:00 PM | 4:00 AM | next day |
| 3:00 PM | 7:00 AM | next day |
| 5:00 PM | 9:00 AM | next day |
| 6:00 PM | 10:00 AM | next day |
| 9:00 PM | 1:00 PM | next day |
Why people convert COT to AEDT time
- Scheduling a call from COT to AEDT: a 10:00 AM start in COT lands at 2:00 AM in AEDT the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +16h gap: COT and AEDT 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 AEDT is 1:00 AM in COT.
- Coordinating a COT-based team with AEDT 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 +16h gap is not.
- With a +16h gap there is no shared 9-to-5 window, so alternate the early start: one week COT takes the early slot, the next week AEDT 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 AEDT (Australian Eastern Daylight Time)
Australian Eastern Daylight Time (AEDT) is the daylight saving period in south-eastern Australia, one hour ahead of Australian Eastern Standard Time (AEST, UTC+10:00). Because Australia is in the southern hemisphere, AEDT runs through the summer — from the first Sunday in October to the first Sunday in April — which is almost exactly the reverse of the European and North American schedules. New South Wales, Victoria, Tasmania and the Australian Capital Territory observe it; Queensland and the Northern Territory do not, so Brisbane stays on AEST year round while Sydney moves to AEDT. During AEDT, Sydney is 11 hours ahead of UTC and 16 hours ahead of New York.
Best time to call between COT and AEDT
With a +16h offset there is no overlap inside a normal 9 AM – 5 PM day. AEDT opens at 9:00 AM AEDT, which is 1:00 AM in COT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
COT and AEDT have no shared working hours because of the +16h gap. Teams need to alternate early starts or rely on asynchronous handovers.
COT is 16 hours ahead of AEDT (COT UTC-05:00 → AEDT UTC+11:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
COT
Does not observe DST
AEDT
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between COT and AEDT?
COT (COT, UTC-05:00) is 16 hours ahead of AEDT (AEDT, UTC+11:00). The gap is currently +16h.
How do I convert COT time to AEDT time?
Add +16h to COT local time. For example, 9:00 AM in COT is 1:00 AM in AEDT (next day).
What time is it in AEDT right now?
AEDT uses AEDT at UTC+11:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +16h offset from COT.
What is the best time to call AEDT from COT?
There is no shared working-hours window because of the +16h gap. The closest option is 1:00 PM in COT, which is 5:00 AM in AEDT.
Which is ahead, COT or AEDT?
COT is 16 hours ahead of AEDT. When it is 12:00 PM in COT it is 4:00 AM in AEDT.
Does daylight saving time affect the COT–AEDT difference?
Neither zone observes daylight saving time, so the +16h offset between COT and AEDT 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 AEDT?
Sometimes. The +16h gap is large enough that 8:00 PM or later in COT already falls on the next day in AEDT.
What is the time difference between COT and AEDT?
AEDT is +16h from COT.
What timezone is COT in?
COT operates on its local timezone.
What timezone is AEDT in?
AEDT 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 AEDT timezone?
Major cities in the AEDT timezone include Sydney, Melbourne, Canberra, Hobart, Newcastle.
What is the UTC offset for AEDT?
Australian Eastern Daylight Time (AEDT) is at UTC+11:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEDT timezone?
AEDT runs from the first Sunday in October to the first Sunday in April. AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
When is it midnight in COT, what time is it in AEDT?
When it is 12:00 AM (midnight) in COT (COT), it is +16h later in AEDT (AEDT).
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