ART to MST Time Converter

Convert Argentina Time (ART) to Mountain Standard Time (MST). Both time zones are shown live below; current offset between them is 3 hours behind.

Buenos Aires · Argentina Time
08:57:42
Wednesday, May 13, 2026
GMT-3 · UTC-03:00
Denver · Mountain Standard Time
05:57:42
Wednesday, May 13, 2026
MDT · UTC-06:00

Convert a specific time

From: ART (Buenos Aires)
To: MST (Denver)
--:--

Daylight Saving status right now

ART (Argentina Time)
Observes DST
No
MST (Mountain Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-06:00 → UTC-07:00

Heads up: MST observes DST while ART does not. The 3-hour difference shown above will shift by one hour when MST starts or ends DST.

When can ART and MST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
ART
MST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Buenos Aires (ART). Each row shows the local working-hours state in that zone for the same moment in time.
5 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 12:00–16:00 ART (09:00–13:00 MST).

Hour-by-hour ART to MST conversion table

ART time (Buenos Aires)MST time (Denver)Status
00:00 Wed21:00 TueOff-hours both sides
01:00 Wed22:00 TueOff-hours both sides
02:00 Wed23:00 TueOff-hours both sides
03:00 Wed00:00 WedOff-hours both sides
04:00 Wed01:00 WedOff-hours both sides
05:00 Wed02:00 WedOff-hours both sides
06:00 Wed03:00 WedOff-hours both sides
07:00 Wed04:00 WedOff-hours both sides
08:00 Wed05:00 WedOff-hours both sides
09:00 Wed06:00 WedART working
10:00 Wed07:00 WedART working
11:00 Wed08:00 WedART working
12:00 Wed09:00 WedBoth at work
13:00 Wed10:00 WedBoth at work
14:00 Wed11:00 WedBoth at work
15:00 Wed12:00 WedBoth at work
16:00 Wed13:00 WedBoth at work
17:00 Wed14:00 WedMST working
18:00 Wed15:00 WedMST working
19:00 Wed16:00 WedMST working
20:00 Wed17:00 WedOff-hours both sides
21:00 Wed18:00 WedOff-hours both sides
22:00 Wed19:00 WedOff-hours both sides
23:00 Wed20:00 WedOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Argentina Time (ART)
IANA identifier
America/Argentina/Buenos_Aires
Current UTC offset
UTC-03:00
Current abbreviation
GMT-3
Major cities in this zone
Buenos Aires
Mountain Standard Time (MST)
IANA identifier
America/Denver
Current UTC offset
UTC-06:00
Current abbreviation
MDT
Major cities in this zone
DenverPhoenixSalt Lake CityAlbuquerque

Sun today in Buenos Aires and Denver

Denver
Sunrise
05:48
Sunset
20:06
Solar noon
12:57
Daylight
14h 18m

Related converters

MST to ART (reverse)ART to ESTART to PSTART to GMTART to UTCART to CETEST to MSTPST to MSTGMT to MSTUTC to MSTCET to MST
Looking for local time? See time in Buenos Aires or time in Denver.

Frequently asked questions

What is the time difference between ART and MST right now?+
MST (Mountain Standard Time) is currently 3 hours behind ART (Argentina Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does ART or MST observe daylight saving time?+
ART: does not observe daylight saving time. MST: observes daylight saving time.
When is the best time to schedule a meeting between ART and MST?+
The strongest overlap is 12:00–16:00 ART (09:00–13:00 MST), giving 5 hours when both sides are within standard 9am-5pm working hours.
What time is it in Denver when it is 12:00 noon in Buenos Aires?+
When it is 12:00 Wed in Buenos Aires (ART), it is 09:00 Wed in Denver (MST).
Which IANA time zone identifiers are used for ART and MST?+
ART maps to "America/Argentina/Buenos_Aires" in the IANA database. MST maps to "America/Denver". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Buenos Aires ahead of or behind Denver?+
Whether Buenos Aires (ART) is ahead of or behind Denver (MST) depends on the current UTC offsets. Right now MST is 3 hours behind ART. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for ART and MST?+
ART is UTC-03:00 (GMT-3) and MST is UTC-06:00 (MDT). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both ART and MST?+
Yes. There are 5 hours of overlap during standard 9am-5pm working hours, with the strongest window at 12:00–16:00 ART.