Perth to COT
-13hPerth
AWSTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
AWST and COT on the World Map
The map below highlights the AWST (Australian Western Standard Time) and COT (Colombia Time) timezone regions across the globe.
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.
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.
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.
Perth to COT Time Difference – Complete Guide
Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. COT runs on Colombia Time (COT) at UTC-05:00. That puts Perth 13 hours behind COT — a difference of -13h at the current offsets.
In practice, when it is 9:00 AM in Perth it is 8:00 PM in COT on the previous day. Midnight in Perth is 11:00 AM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Perth to COT time conversion table
| Perth (AWST) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 11:00 AM | previous day |
| 6:00 AM | 5:00 PM | previous day |
| 7:00 AM | 6:00 PM | previous day |
| 8:00 AM | 7:00 PM | previous day |
| 9:00 AM | 8:00 PM | previous day |
| 12:00 PM | 11:00 PM | previous day |
| 3:00 PM | 2:00 AM | same day |
| 5:00 PM | 4:00 AM | same day |
| 6:00 PM | 5:00 AM | same day |
| 9:00 PM | 8:00 AM | same day |
Why people convert Perth to COT time
- Scheduling a call from Perth to COT: a 10:00 AM start in Perth lands at 9:00 PM in COT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -13h gap: Perth and COT 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 COT is 8:00 PM in Perth.
- Watching a live event or market open: Perth viewers need 8:00 PM in COT to catch a 9:00 AM start there, and 1:00 PM if the event is anchored to Perth.
- Always state the zone abbreviation, not just the hour. "3:00 PM AWST" 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 Perth takes the early slot, the next week COT does.
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.
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 Perth and COT
With a -13h offset there is no overlap inside a normal 9 AM – 5 PM day. COT opens at 9:00 AM COT, which is 8:00 PM in Perth, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Perth and COT have no shared working hours because of the -13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Perth is 13 hours behind COT (AWST UTC+08:00 → COT UTC-05:00). 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 Perth and COT?
Perth (AWST, UTC+08:00) is 13 hours behind COT (COT, UTC-05:00). The gap is currently -13h.
How do I convert Perth time to COT time?
Add -13h to Perth local time. For example, 9:00 AM in Perth is 8:00 PM in COT (previous day).
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 -13h offset from Perth.
What is the best time to call COT from Perth?
There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in Perth, which is 12:00 AM in COT.
Which is behind, Perth or COT?
Perth is 13 hours behind COT. When it is 12:00 PM in Perth it is 11:00 PM in COT.
Do Perth and COT use different time zones?
Perth (Australia) uses AWST at UTC+08:00, while COT uses COT at UTC-05:00. The IANA identifiers are Australia/Perth and America/Bogota.
Does daylight saving time affect the Perth–COT difference?
Neither zone observes daylight saving time, so the -13h offset between Perth and COT is fixed all year.
Which other cities share Perth's time zone?
AWST also covers Perth, Mandurah, Bunbury, Geraldton.
Which countries use AWST, Perth's zone?
AWST is used in Australia (Western Australia).
Is there a day difference between Perth and COT?
Sometimes. The -13h gap is large enough that 8:00 PM or later in Perth already falls on the in COT.
What is the time difference between Perth and COT?
COT is -13h from Perth.
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 timezone is COT in?
COT operates on its local timezone.
What are the business hours in Perth?
Standard business hours in Perth are 9:00 AM - 5:00 PM AWST.
Which countries use AWST (Australian Western Standard Time)?
AWST is used in Australia (Western Australia).
Does AWST observe daylight saving time?
No, AWST does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about AWST?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
Which cities are in the COT timezone?
Major cities in the COT timezone include Bogotá, Medellín, Cali, Barranquilla, Cartagena.
What is the UTC offset for COT?
Colombia Time (COT) is at UTC-05:00.
What should I know about the COT timezone?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
When is it midnight in Perth, what time is it in COT?
When it is 12:00 AM (midnight) in Perth (AWST), it is -13h later in COT (COT).
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