COT to Japan
+14hCOT
COTSOURCEJapan
JSTGreen rows indicate typical business hours (9 AM - 5 PM)
COT and JST on the World Map
The map below highlights the COT (Colombia Time) and JST (Japan 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.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
Time Conversion Guide: COT to Japan
COT runs on Colombia Time (COT) at UTC-05:00. Japan runs on Japan Standard Time (JST) at UTC+09:00. That puts COT 14 hours ahead of Japan — a difference of +14h at the current offsets.
In practice, when it is 9:00 AM in COT it is 11:00 PM in Japan. Midnight in COT is 2:00 PM in Japan. Neither zone observes daylight saving time, so the offset between them stays constant all year.
COT to Japan time conversion table
| COT (COT) | Japan (JST) | Day |
|---|---|---|
| 12:00 AM | 2:00 PM | same day |
| 6:00 AM | 8:00 PM | same day |
| 7:00 AM | 9:00 PM | same day |
| 8:00 AM | 10:00 PM | same day |
| 9:00 AM | 11:00 PM | same day |
| 12:00 PM | 2:00 AM | next day |
| 3:00 PM | 5:00 AM | next day |
| 5:00 PM | 7:00 AM | next day |
| 6:00 PM | 8:00 AM | next day |
| 9:00 PM | 11:00 AM | next day |
Why people convert COT to Japan time
- Scheduling a call from COT to Japan: a 10:00 AM start in COT lands at 12:00 AM in Japan the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +14h gap: COT and Japan 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 Japan is 11:00 PM in COT.
- Booking travel or deliveries: tracking Japan local time against COT keeps pickup windows and arrival estimates honest across the +14h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM COT" is unambiguous; "3 PM" across a +14h gap is not.
- With a +14h gap there is no shared 9-to-5 window, so alternate the early start: one week COT takes the early slot, the next week Japan 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 JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
Best time to call between COT and Japan
With a +14h offset there is no overlap inside a normal 9 AM – 5 PM day. Japan opens at 9:00 AM JST, which is 11:00 PM in COT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
COT and Japan have no shared working hours because of the +14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
COT is 14 hours ahead of Japan (COT UTC-05:00 → JST UTC+09:00). 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 Japan?
COT (COT, UTC-05:00) is 14 hours ahead of Japan (JST, UTC+09:00). The gap is currently +14h.
How do I convert COT time to Japan time?
Add +14h to COT local time. For example, 9:00 AM in COT is 11:00 PM in Japan.
What time is it in Japan right now?
Japan uses JST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +14h offset from COT.
What is the best time to call Japan from COT?
There is no shared working-hours window because of the +14h gap. The closest option is 1:00 PM in COT, which is 3:00 AM in Japan.
Which is ahead, COT or Japan?
COT is 14 hours ahead of Japan. When it is 12:00 PM in COT it is 2:00 AM in Japan.
Do COT and Japan use different time zones?
COT uses COT at UTC-05:00, while Japan (Japan) uses JST at UTC+09:00. The IANA identifiers are America/Bogota and Asia/Tokyo.
Does daylight saving time affect the COT–Japan difference?
Neither zone observes daylight saving time, so the +14h offset between COT and Japan 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 Japan?
Sometimes. The +14h gap is large enough that 8:00 PM or later in COT already falls on the next day in Japan.
What is the time difference between COT and Japan?
Japan is +14h from COT.
What timezone is COT in?
COT operates on its local timezone.
What timezone is Japan in?
Japan 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 JST timezone?
Major cities in the JST timezone include Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka.
What is the UTC offset for JST?
Japan Standard Time (JST) is at UTC+09:00.
What should I know about the JST timezone?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
When is it midnight in COT, what time is it in Japan?
When it is 12:00 AM (midnight) in COT (COT), it is +14h later in Japan (JST).
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