COT to MST
-2hCOT
COTSOURCEMST
MSTGreen rows indicate typical business hours (9 AM - 5 PM)
COT and MST on the World Map
The map below highlights the COT (Colombia Time) and MST (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.
COT vs MST: Offsets, DST and Best Call Times
COT runs on Colombia Time (COT) at UTC-05:00. MST runs on Mountain Standard Time (MST) at UTC-07:00. That puts COT 2 hours behind MST — a difference of -2h at the current offsets.
In practice, when it is 9:00 AM in COT it is 7:00 AM in MST. Midnight in COT is 10:00 PM in MST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
COT to MST time conversion table
| COT (COT) | MST (MST) | Day |
|---|---|---|
| 12:00 AM | 10:00 PM | previous day |
| 6:00 AM | 4:00 AM | same day |
| 7:00 AM | 5:00 AM | same day |
| 8:00 AM | 6:00 AM | same day |
| 9:00 AM | 7:00 AM | same day |
| 12:00 PM | 10:00 AM | same day |
| 3:00 PM | 1:00 PM | same day |
| 5:00 PM | 3:00 PM | same day |
| 6:00 PM | 4:00 PM | same day |
| 9:00 PM | 7:00 PM | same day |
Why people convert COT to MST time
- Scheduling a call from COT to MST: a 10:00 AM start in COT lands at 8:00 AM in MST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both COT and MST are inside the 9-to-5 working day between 11:00 AM and 5:00 PM COT time (9:00 AM–3:00 PM MST). That is roughly 6 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in COT is 6:00 PM in MST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM COT" is unambiguous; "3 PM" across a -2h gap is not.
- Block 11:00 AM–5:00 PM COT as the recurring meeting window if you work primarily from COT and need MST colleagues present.
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 MST
Both COT and MST sit inside the 9 AM – 5 PM working day between 11:00 AM–5:00 PM COT, which is 9:00 AM–3:00 PM MST. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
COT and MST share 6 hours of working-hours overlap (11:00 AM–5:00 PM COT), so scheduling a live meeting is straightforward.
COT is 2 hours behind MST (COT UTC-05:00 → MST UTC-07:00). The shared working window is 11:00 AM–5:00 PM COT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
COT
Does not observe DST
MST
☀ 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 MST?
COT (COT, UTC-05:00) is 2 hours behind MST (MST, UTC-07:00). The gap is currently -2h.
How do I convert COT time to MST time?
Add -2h to COT local time. For example, 9:00 AM in COT is 7:00 AM in MST.
What time is it in MST right now?
MST uses MST at UTC-07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h offset from COT.
What is the best time to call MST from COT?
Call between 11:00 AM and 5:00 PM COT — that maps to 9:00 AM–3:00 PM MST and keeps both parties inside the working day.
Which is behind, COT or MST?
COT is 2 hours behind MST. When it is 12:00 PM in COT it is 10:00 AM in MST.
Does daylight saving time affect the COT–MST difference?
Neither zone observes daylight saving time, so the -2h offset between COT and MST 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 MST?
Not normally. The -2h gap only pushes the date over the previous day.
What is the time difference between COT and MST?
MST is -2h from COT.
What timezone is COT in?
COT operates on its local timezone.
What timezone is MST in?
MST 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 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 MST?
When it is 12:00 AM (midnight) in COT (COT), it is -2h later in MST (MST).
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