BDST to COT
-11hBDST
BDSTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
BDST and COT on the World Map
The map below highlights the BDST (Bangladesh Standard Time) and COT (Colombia Time) timezone regions across the globe.
BDST – Bangladesh Standard Time
UTC+06:00Bangladesh Standard Time (BDST, UTC+06:00) is the time zone for Bangladesh, 6 hours ahead of UTC.
- •Bangladesh uses a single time zone, UTC+06:00, across the entire country.
- •Bangladesh does not observe daylight saving time, so the offset is fixed all year.
- •Dhaka is one of the most densely populated cities globally.
- •BDST is written here to distinguish it from British Summer Time (BST).
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.
Everything You Need to Know About BDST and COT Time
BDST runs on Bangladesh Standard Time (BDST) at UTC+06:00. COT runs on Colombia Time (COT) at UTC-05:00. That puts BDST 11 hours behind COT — a difference of -11h at the current offsets.
In practice, when it is 9:00 AM in BDST it is 10:00 PM in COT on the previous day. Midnight in BDST is 1:00 PM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
BDST to COT time conversion table
| BDST (BDST) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | previous day |
| 6:00 AM | 7:00 PM | previous day |
| 7:00 AM | 8:00 PM | previous day |
| 8:00 AM | 9:00 PM | previous day |
| 9:00 AM | 10:00 PM | previous day |
| 12:00 PM | 1:00 AM | same day |
| 3:00 PM | 4:00 AM | same day |
| 5:00 PM | 6:00 AM | same day |
| 6:00 PM | 7:00 AM | same day |
| 9:00 PM | 10:00 AM | same day |
Why people convert BDST to COT time
- Scheduling a call from BDST to COT: a 10:00 AM start in BDST lands at 11:00 PM in COT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -11h gap: BDST 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 10:00 PM in BDST.
- Keeping family and friends in sync: knowing that 8:00 PM in BDST is 9:00 AM in COT makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM BDST" is unambiguous; "3 PM" across a -11h gap is not.
- With a -11h gap there is no shared 9-to-5 window, so alternate the early start: one week BDST takes the early slot, the next week COT does.
About BDST (Bangladesh Standard Time)
Bangladesh Standard Time (BDST) is the single time zone used across Bangladesh, fixed at UTC+06:00 all year. Bangladesh has not observed daylight saving time since a short-lived experiment in 2009, so the gap between Bangladesh and every other zone is constant. Dhaka, the capital, is one of the most densely populated cities in the world. Because the country sits close to the middle of the UTC+06:00 band, solar noon is near 12:00 for most of the year. BDST is listed separately from British Summer Time, which shares the BST abbreviation but is UTC+01:00.
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 BDST and COT
With a -11h offset there is no overlap inside a normal 9 AM – 5 PM day. COT opens at 9:00 AM COT, which is 10:00 PM in BDST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
BDST and COT have no shared working hours because of the -11h gap. Teams need to alternate early starts or rely on asynchronous handovers.
BDST is 11 hours behind COT (BDST UTC+06:00 → 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 BDST and COT?
BDST (BDST, UTC+06:00) is 11 hours behind COT (COT, UTC-05:00). The gap is currently -11h.
How do I convert BDST time to COT time?
Add -11h to BDST local time. For example, 9:00 AM in BDST is 10:00 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 -11h offset from BDST.
What is the best time to call COT from BDST?
There is no shared working-hours window because of the -11h gap. The closest option is 1:00 PM in BDST, which is 2:00 AM in COT.
Which is behind, BDST or COT?
BDST is 11 hours behind COT. When it is 12:00 PM in BDST it is 1:00 AM in COT.
Does daylight saving time affect the BDST–COT difference?
Neither zone observes daylight saving time, so the -11h offset between BDST and COT is fixed all year.
Which other cities share BDST's time zone?
BDST also covers Dhaka, Chittagong, Khulna, Rajshahi, Sylhet.
Which countries use BDST, BDST's zone?
BDST is used in Bangladesh.
Is there a day difference between BDST and COT?
Not normally. The -11h gap only pushes the date over the previous day.
What is the time difference between BDST and COT?
COT is -11h from BDST.
What timezone is BDST in?
BDST operates on its local timezone.
What timezone is COT in?
COT operates on its local timezone.
Which countries use BDST (Bangladesh Standard Time)?
BDST is used in Bangladesh.
Does BDST observe daylight saving time?
No, BDST does not observe daylight saving time and remains at UTC+06:00 year-round.
What are some interesting facts about BDST?
Bangladesh uses a single time zone, UTC+06:00, across the entire country. Bangladesh does not observe daylight saving time, so the offset is fixed all year.
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 BDST, what time is it in COT?
When it is 12:00 AM (midnight) in BDST (BDST), it is -11h later in COT (COT).
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See every conversion from BDST →·See every conversion from COT →