Japan to COT
-14hJapan
JSTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and COT on the World Map
The map below highlights the JST (Japan Standard Time) and COT (Colombia Time) timezone regions across the globe.
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.
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.
Understanding the -14h Gap: Japan vs COT
Japan runs on Japan Standard Time (JST) at UTC+09:00. COT runs on Colombia Time (COT) at UTC-05:00. That puts Japan 14 hours behind COT — a difference of -14h at the current offsets.
In practice, when it is 9:00 AM in Japan it is 7:00 PM in COT on the previous day. Midnight in Japan is 10:00 AM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Japan to COT time conversion table
| Japan (JST) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 10:00 AM | previous day |
| 6:00 AM | 4:00 PM | previous day |
| 7:00 AM | 5:00 PM | previous day |
| 8:00 AM | 6:00 PM | previous day |
| 9:00 AM | 7:00 PM | previous day |
| 12:00 PM | 10:00 PM | previous day |
| 3:00 PM | 1:00 AM | same day |
| 5:00 PM | 3:00 AM | same day |
| 6:00 PM | 4:00 AM | same day |
| 9:00 PM | 7:00 AM | same day |
Why people convert Japan to COT time
- Scheduling a call from Japan to COT: a 10:00 AM start in Japan lands at 8:00 PM in COT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h gap: Japan 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 7:00 PM in Japan.
- Watching a live event or market open: Japan viewers need 7:00 PM in COT to catch a 9:00 AM start there, and 2:00 PM if the event is anchored to Japan.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" 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 Japan takes the early slot, the next week COT does.
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.
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 Japan and COT
With a -14h offset there is no overlap inside a normal 9 AM – 5 PM day. COT opens at 9:00 AM COT, which is 7:00 PM in Japan, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Japan and COT have no shared working hours because of the -14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Japan is 14 hours behind COT (JST UTC+09:00 → 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 Japan and COT?
Japan (JST, UTC+09:00) is 14 hours behind COT (COT, UTC-05:00). The gap is currently -14h.
How do I convert Japan time to COT time?
Add -14h to Japan local time. For example, 9:00 AM in Japan is 7:00 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 -14h offset from Japan.
What is the best time to call COT from Japan?
There is no shared working-hours window because of the -14h gap. The closest option is 1:00 PM in Japan, which is 11:00 PM in COT.
Which is behind, Japan or COT?
Japan is 14 hours behind COT. When it is 12:00 PM in Japan it is 10:00 PM in COT.
Do Japan and COT use different time zones?
Japan (Japan) uses JST at UTC+09:00, while COT uses COT at UTC-05:00. The IANA identifiers are Asia/Tokyo and America/Bogota.
Does daylight saving time affect the Japan–COT difference?
Neither zone observes daylight saving time, so the -14h offset between Japan and COT is fixed all year.
Which other cities share Japan's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, Japan's zone?
JST is used in Japan.
Is there a day difference between Japan and COT?
Sometimes. The -14h gap is large enough that 8:00 PM or later in Japan already falls on the in COT.
What is the time difference between Japan and COT?
COT is -14h from Japan.
What timezone is Japan in?
Japan operates on its local timezone.
What timezone is COT in?
COT operates on its local timezone.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area 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 Japan, what time is it in COT?
When it is 12:00 AM (midnight) in Japan (JST), it is -14h later in COT (COT).
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