MDT to COT
+1hMDT
MDTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
MDT and COT on the World Map
The map below highlights the MDT (Mountain Daylight Time) and COT (Colombia Time) timezone regions across the globe.
MDT – Mountain Daylight Time
UTC-06:00Mountain Daylight Time (MDT) is the daylight saving offset in the Mountain Time Zone, 6 hours behind UTC.
- •MDT shares the same offset as CST (UTC-06:00).
- •Arizona does not switch to MDT, remaining on MST.
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.
Comparing Time Zones: MDT and COT
MDT runs on Mountain Daylight Time (MDT) at UTC-06:00. COT runs on Colombia Time (COT) at UTC-05:00. That puts MDT 1 hour ahead of COT — a difference of +1h at the current offsets.
In practice, when it is 9:00 AM in MDT it is 10:00 AM in COT. Midnight in MDT is 1:00 AM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MDT to COT time conversion table
| MDT (MDT) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 1:00 AM | same day |
| 6:00 AM | 7:00 AM | same day |
| 7:00 AM | 8:00 AM | same day |
| 8:00 AM | 9:00 AM | same day |
| 9:00 AM | 10:00 AM | same day |
| 12:00 PM | 1:00 PM | same day |
| 3:00 PM | 4:00 PM | same day |
| 5:00 PM | 6:00 PM | same day |
| 6:00 PM | 7:00 PM | same day |
| 9:00 PM | 10:00 PM | same day |
Why people convert MDT to COT time
- Scheduling a call from MDT to COT: a 10:00 AM start in MDT lands at 11:00 AM in COT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both MDT and COT are inside the 9-to-5 working day between 9:00 AM and 4:00 PM MDT time (10:00 AM–5:00 PM COT). That is roughly 7 hours of usable overlap.
- Coordinating a MDT-based team with COT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM MDT" is unambiguous; "3 PM" across a +1h gap is not.
- Block 9:00 AM–4:00 PM MDT as the recurring meeting window if you work primarily from MDT and need COT colleagues present.
About MDT (Mountain Daylight Time)
Mountain Daylight Time (MDT) is observed during summer months in the Mountain Time Zone, except in Arizona which stays on MST year-round. MDT aligns with Central Standard Time (CST) at UTC-06:00.
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 MDT and COT
Both MDT and COT sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM MDT, which is 10:00 AM–5:00 PM COT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
MDT and COT share 7 hours of working-hours overlap (9:00 AM–4:00 PM MDT), so scheduling a live meeting is straightforward.
MDT is 1 hour ahead of COT (MDT UTC-06:00 → COT UTC-05:00). The shared working window is 9:00 AM–4:00 PM MDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
MDT
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
COT
Does not observe DST
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 MDT and COT?
MDT (MDT, UTC-06:00) is 1 hour ahead of COT (COT, UTC-05:00). The gap is currently +1h.
How do I convert MDT time to COT time?
Add +1h to MDT local time. For example, 9:00 AM in MDT is 10:00 AM in COT.
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 +1h offset from MDT.
What is the best time to call COT from MDT?
Call between 9:00 AM and 4:00 PM MDT — that maps to 10:00 AM–5:00 PM COT and keeps both parties inside the working day.
Which is ahead, MDT or COT?
MDT is 1 hour ahead of COT. When it is 12:00 PM in MDT it is 1:00 PM in COT.
Does daylight saving time affect the MDT–COT difference?
Neither zone observes daylight saving time, so the +1h offset between MDT and COT is fixed all year.
Which other cities share MDT's time zone?
MDT also covers Denver, Calgary, Edmonton, Salt Lake City, Boise.
Which countries use MDT, MDT's zone?
MDT is used in United States (Mountain), Canada (Alberta).
Is there a day difference between MDT and COT?
Not normally. The +1h gap only pushes the date over for late-evening times.
What is the time difference between MDT and COT?
COT is +1h from MDT.
What timezone is MDT in?
MDT operates on its local timezone.
What timezone is COT in?
COT operates on its local timezone.
Which countries use MDT (Mountain Daylight Time)?
MDT is used in United States (Mountain), Canada (Alberta).
Does MDT observe daylight saving time?
Yes, MDT switches to MST during summer months.
What are some interesting facts about MDT?
MDT shares the same offset as CST (UTC-06:00). Arizona does not switch to MDT, remaining on MST.
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 MDT, what time is it in COT?
When it is 12:00 AM (midnight) in MDT (MDT), it is +1h later in COT (COT).
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See every conversion from MDT →·See every conversion from COT →