Denver to Buenos Aires
+3hDenver
MDTSOURCEBuenos Aires
ARTGreen rows indicate typical business hours (9 AM - 5 PM)
MDT and ART on the World Map
The map below highlights the MDT (Mountain Standard Time) and ART (Argentina Time) timezone regions across the globe.
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.
ART – Argentina Time
UTC-03:00Argentina Time (ART) is the standard time for Argentina, 3 hours behind UTC.
- •Argentina does not observe daylight saving time.
- •Buenos Aires is one of the most visited cities in South America.
- •ART is the same offset as BRT (UTC-03:00).
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.
About Buenos Aires
WikipediaBuenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.
The Teatro Colón is considered one of the best opera houses in the world for acoustics.
Comparing Time Zones: Denver and Buenos Aires
Denver runs on Mountain Daylight Time (MDT) at UTC-06:00, currently observing daylight saving time. Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. That puts Denver 3 hours ahead of Buenos Aires — a difference of +3h at the current offsets.
In practice, when it is 9:00 AM in Denver it is 12:00 PM in Buenos Aires. Midnight in Denver is 3:00 AM in Buenos Aires.Denver observes daylight saving time while Buenos Aires does not, so the gap narrows or widens by an hour part of the year.
Denver to Buenos Aires time conversion table
| Denver (MDT) | Buenos Aires (ART) | Day |
|---|---|---|
| 12:00 AM | 3:00 AM | same day |
| 6:00 AM | 9:00 AM | same day |
| 7:00 AM | 10:00 AM | same day |
| 8:00 AM | 11:00 AM | same day |
| 9:00 AM | 12:00 PM | same day |
| 12:00 PM | 3:00 PM | same day |
| 3:00 PM | 6:00 PM | same day |
| 5:00 PM | 8:00 PM | same day |
| 6:00 PM | 9:00 PM | same day |
| 9:00 PM | 12:00 AM | next day |
Why people convert Denver to Buenos Aires time
- Scheduling a call from Denver to Buenos Aires: a 10:00 AM start in Denver lands at 1:00 PM in Buenos Aires, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Denver and Buenos Aires are inside the 9-to-5 working day between 9:00 AM and 2:00 PM MDT time (12:00 PM–5:00 PM ART). That is roughly 5 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Denver is 11:00 PM in Buenos Aires makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM MDT" is unambiguous; "3 PM" across a +3h gap is not.
- Block 9:00 AM–2:00 PM MDT as the recurring meeting window if you work primarily from Denver and need Buenos Aires colleagues present.
- Denver: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +3h gap.
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).
About ART (Argentina Time)
Argentina Time (ART) is the time zone used throughout Argentina. Argentina does not observe daylight saving time. ART shares the same offset as Brasilia Time (BRT) and Uruguay's UYT.
Best time to call between Denver and Buenos Aires
Both Denver and Buenos Aires sit inside the 9 AM – 5 PM working day between 9:00 AM–2:00 PM MDT, which is 12:00 PM–5:00 PM ART. That gives roughly 5 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Denver and Buenos Aires share 5 hours of working-hours overlap (9:00 AM–2:00 PM MDT), so scheduling a live meeting is straightforward.
Denver is 3 hours ahead of Buenos Aires (MDT UTC-06:00 → ART UTC-03:00). The shared working window is 9:00 AM–2:00 PM MDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Denver
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
Buenos Aires
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 Denver and Buenos Aires?
Denver (MDT, UTC-06:00) is 3 hours ahead of Buenos Aires (ART, UTC-03:00). The gap is currently +3h.
How do I convert Denver time to Buenos Aires time?
Add +3h to Denver local time. For example, 9:00 AM in Denver is 12:00 PM in Buenos Aires.
What time is it in Buenos Aires right now?
Buenos Aires uses ART at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +3h offset from Denver.
What is the best time to call Buenos Aires from Denver?
Call between 9:00 AM and 2:00 PM MDT — that maps to 12:00 PM–5:00 PM ART and keeps both parties inside the working day.
Which is ahead, Denver or Buenos Aires?
Denver is 3 hours ahead of Buenos Aires. When it is 12:00 PM in Denver it is 3:00 PM in Buenos Aires.
Do Denver and Buenos Aires use different time zones?
Denver (USA) uses MDT at UTC-06:00, while Buenos Aires (Argentina) uses ART at UTC-03:00. The IANA identifiers are America/Denver and America/Buenos_Aires.
Does daylight saving time affect the Denver–Buenos Aires difference?
Yes at the moment: Denver is on daylight saving time and Buenos Aires is not, so the +3h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Denver's time zone?
MDT also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.
Which countries use MDT, Denver's zone?
MDT is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Is there a day difference between Denver and Buenos Aires?
Not normally. The +3h gap only pushes the date over for late-evening times.
What is the time difference between Denver and Buenos Aires?
Buenos Aires is +3h from Denver.
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 timezone is Buenos Aires in?
Buenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.
What are the business hours in Denver?
Standard business hours in Denver are 8:00 AM - 5:00 PM MST.
What are the business hours in Buenos Aires?
Standard business hours in Buenos Aires are 9:00 AM - 6:00 PM ART.
What is the best time to schedule a call between Denver and Buenos Aires?
The best overlap for a call is when both cities are in business hours. Denver works 8:00 AM - 5:00 PM MST and Buenos Aires works 9:00 AM - 6:00 PM ART (+3h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Denver and Buenos Aires?
Denver uses USD ($) while Buenos Aires uses ARS ($). Check current exchange rates when planning travel or business between these cities.
How do Denver and Buenos Aires compare in size?
Denver has a population of approximately 715,000 (metro: 2.9 million), while Buenos Aires has approximately 3 million (metro: 15.4 million).
What are the major landmarks in Denver and Buenos Aires?
Denver is known for Red Rocks Amphitheatre, Denver Art Museum, Union Station. Buenos Aires is famous for Casa Rosada, Teatro Colón, La Boca.
Do Denver and Buenos Aires have stock exchanges?
Yes. Denver has the N/A (Uses NYSE/NASDAQ) and Buenos Aires has the BCBA (Buenos Aires Stock Exchange). The +3h time difference affects trading hour overlaps between these exchanges.
Which countries use MST (Mountain Standard Time)?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Does MST observe daylight saving time?
Yes, MST switches to MDT during summer months.
What are some interesting facts about MST?
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.
Which cities are in the ART timezone?
Major cities in the ART timezone include Buenos Aires, Córdoba, Rosario, Mendoza, La Plata, Tucumán.
What is the UTC offset for ART?
Argentina Time (ART) is at UTC-03:00.
What should I know about the ART timezone?
Argentina does not observe daylight saving time. Buenos Aires is one of the most visited cities in South America.
When is it midnight in Denver, what time is it in Buenos Aires?
When it is 12:00 AM (midnight) in Denver (MST), it is +3h later in Buenos Aires (ART).
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