COT to Denver
-1hCOT
COTSOURCEDenver
MDTGreen rows indicate typical business hours (9 AM - 5 PM)
COT and MDT on the World Map
The map below highlights the COT (Colombia Time) and MDT (Mountain 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.
MST – Mountain Standard Time
UTC-07:00Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.
- •Arizona does not observe daylight saving time, staying on MST year-round.
- •The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
- •Denver, the 'Mile High City', is the largest city fully in MST.
- •MST covers 6 US states entirely and parts of several others.
About Denver
WikipediaDenver operates on Mountain Time (MST/MDT), 2 hours behind New York. As a tech and aerospace hub, Denver bridges West Coast and Central US business hours.
Denver International Airport is the largest airport in North America by land area.
COT vs Denver: Offsets, DST and Best Call Times
COT runs on Colombia Time (COT) at UTC-05:00. Denver runs on Mountain Daylight Time (MDT) at UTC-06:00, also currently on daylight saving time. That puts COT 1 hour behind Denver — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in COT it is 8:00 AM in Denver. Midnight in COT is 11:00 PM in Denver.Denver observes daylight saving time while COT does not, so the gap narrows or widens by an hour part of the year.
COT to Denver time conversion table
| COT (COT) | Denver (MDT) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert COT to Denver time
- Scheduling a call from COT to Denver: a 10:00 AM start in COT lands at 9:00 AM in Denver, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both COT and Denver are inside the 9-to-5 working day between 10:00 AM and 5:00 PM COT time (9:00 AM–4:00 PM MDT). That is roughly 7 hours of usable overlap.
- Watching a live event or market open: COT viewers need 8:00 AM in Denver to catch a 9:00 AM start there, and 1:00 AM if the event is anchored to COT.
- Always state the zone abbreviation, not just the hour. "3:00 PM COT" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM COT as the recurring meeting window if you work primarily from COT and need Denver colleagues present.
- Denver: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 MST (Mountain Standard Time)
Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, UTC-06:00).
Best time to call between COT and Denver
Both COT and Denver sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM COT, which is 9:00 AM–4:00 PM MDT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
COT and Denver share 7 hours of working-hours overlap (10:00 AM–5:00 PM COT), so scheduling a live meeting is straightforward.
COT is 1 hour behind Denver (COT UTC-05:00 → MDT UTC-06:00). The shared working window is 10:00 AM–5:00 PM COT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
COT
Does not observe DST
Denver
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
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 Denver?
COT (COT, UTC-05:00) is 1 hour behind Denver (MDT, UTC-06:00). The gap is currently -1h.
How do I convert COT time to Denver time?
Add -1h to COT local time. For example, 9:00 AM in COT is 8:00 AM in Denver.
What time is it in Denver right now?
Denver uses MDT at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from COT.
What is the best time to call Denver from COT?
Call between 10:00 AM and 5:00 PM COT — that maps to 9:00 AM–4:00 PM MDT and keeps both parties inside the working day.
Which is behind, COT or Denver?
COT is 1 hour behind Denver. When it is 12:00 PM in COT it is 11:00 AM in Denver.
Do COT and Denver use different time zones?
COT uses COT at UTC-05:00, while Denver (USA) uses MDT at UTC-06:00. The IANA identifiers are America/Bogota and America/Denver.
Does daylight saving time affect the COT–Denver difference?
Yes at the moment: Denver is on daylight saving time and COT is not, so the -1h gap shifts by an hour when exactly one of them changes clocks.
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 Denver?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between COT and Denver?
Denver is -1h from COT.
What timezone is COT in?
COT operates on its local timezone.
What timezone is Denver in?
Denver operates on Mountain Time (MST/MDT), 2 hours behind New York. As a tech and aerospace hub, Denver bridges West Coast and Central US business hours.
What are the business hours in Denver?
Standard business hours in Denver are 8:00 AM - 5:00 PM MST.
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 MST timezone?
Major cities in the MST timezone include Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson.
What is the UTC offset for MST?
Mountain Standard Time (MST) is at UTC-07:00. During daylight saving time, it shifts to MDT.
What should I know about the MST timezone?
Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
When is it midnight in COT, what time is it in Denver?
When it is 12:00 AM (midnight) in COT (COT), it is -1h later in Denver (MST).
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