COT to Perth
+13hCOT
COTSOURCEPerth
AWSTGreen rows indicate typical business hours (9 AM - 5 PM)
COT and AWST on the World Map
The map below highlights the COT (Colombia Time) and AWST (Australian Western Standard 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.
AWST – Australian Western Standard Time
UTC+08:00Australian Western Standard Time (AWST) is the time zone for Western Australia, 8 hours ahead of UTC.
- •Western Australia does not observe daylight saving time.
- •Perth is the most isolated major city in the world.
- •AWST is the same offset as China Standard Time and Singapore Time.
About Perth
WikipediaPerth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
Western Australia does not observe daylight saving time.
Comparing Time Zones: COT and Perth
COT runs on Colombia Time (COT) at UTC-05:00. Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. That puts COT 13 hours ahead of Perth — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in COT it is 10:00 PM in Perth. Midnight in COT is 1:00 PM in Perth. Neither zone observes daylight saving time, so the offset between them stays constant all year.
COT to Perth time conversion table
| COT (COT) | Perth (AWST) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | same day |
| 6:00 AM | 7:00 PM | same day |
| 7:00 AM | 8:00 PM | same day |
| 8:00 AM | 9:00 PM | same day |
| 9:00 AM | 10:00 PM | same day |
| 12:00 PM | 1:00 AM | next day |
| 3:00 PM | 4:00 AM | next day |
| 5:00 PM | 6:00 AM | next day |
| 6:00 PM | 7:00 AM | next day |
| 9:00 PM | 10:00 AM | next day |
Why people convert COT to Perth time
- Scheduling a call from COT to Perth: a 10:00 AM start in COT lands at 11:00 PM in Perth, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: COT and Perth 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 Perth is 10:00 PM in COT.
- Booking travel or deliveries: tracking Perth local time against COT keeps pickup windows and arrival estimates honest across the +13h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM COT" is unambiguous; "3 PM" across a +13h gap is not.
- With a +13h gap there is no shared 9-to-5 window, so alternate the early start: one week COT takes the early slot, the next week Perth 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 AWST (Australian Western Standard Time)
Australian Western Standard Time (AWST) is used in Western Australia. WA does not observe daylight saving time, having rejected it in multiple referendums. Perth is the most remote major city in the world.
Best time to call between COT and Perth
With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. Perth opens at 9:00 AM AWST, which is 10:00 PM in COT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
COT and Perth have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
COT is 13 hours ahead of Perth (COT UTC-05:00 → AWST UTC+08:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
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 Perth?
COT (COT, UTC-05:00) is 13 hours ahead of Perth (AWST, UTC+08:00). The gap is currently +13h.
How do I convert COT time to Perth time?
Add +13h to COT local time. For example, 9:00 AM in COT is 10:00 PM in Perth.
What time is it in Perth right now?
Perth uses AWST at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +13h offset from COT.
What is the best time to call Perth from COT?
There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in COT, which is 2:00 AM in Perth.
Which is ahead, COT or Perth?
COT is 13 hours ahead of Perth. When it is 12:00 PM in COT it is 1:00 AM in Perth.
Do COT and Perth use different time zones?
COT uses COT at UTC-05:00, while Perth (Australia) uses AWST at UTC+08:00. The IANA identifiers are America/Bogota and Australia/Perth.
Does daylight saving time affect the COT–Perth difference?
Neither zone observes daylight saving time, so the +13h offset between COT and Perth 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 Perth?
Sometimes. The +13h gap is large enough that 8:00 PM or later in COT already falls on the next day in Perth.
What is the time difference between COT and Perth?
Perth is +13h from COT.
What timezone is COT in?
COT operates on its local timezone.
What timezone is Perth in?
Perth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
What are the business hours in Perth?
Standard business hours in Perth are 9:00 AM - 5:00 PM AWST.
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 AWST timezone?
Major cities in the AWST timezone include Perth, Mandurah, Bunbury, Geraldton.
What is the UTC offset for AWST?
Australian Western Standard Time (AWST) is at UTC+08:00.
What should I know about the AWST timezone?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
When is it midnight in COT, what time is it in Perth?
When it is 12:00 AM (midnight) in COT (COT), it is +13h later in Perth (AWST).
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See every conversion from COT →·See every conversion from Perth →