ARBT to MST Time Converter

Convert Arabia Standard Time (ARBT) to Mountain Standard Time (MST). Both time zones are shown live below; current offset between them is 9 hours behind.

Riyadh · Arabia Standard Time
01:15:22
Thursday, May 14, 2026
GMT+3 · UTC+03:00
Denver · Mountain Standard Time
16:15:22
Wednesday, May 13, 2026
MDT · UTC-06:00

Convert a specific time

From: ARBT (Riyadh)
To: MST (Denver)
--:--

Daylight Saving status right now

ARBT (Arabia Standard 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 ARBT does not. The 9-hour difference shown above will shift by one hour when MST starts or ends DST.

When can ARBT and MST meet?

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01
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09
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ARBT
MST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Riyadh (ARBT). Each row shows the local working-hours state in that zone for the same moment in time.
No overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 17:00–18:00 ARBT (08:00–09:00 MST).

Hour-by-hour ARBT to MST conversion table

ARBT time (Riyadh)MST time (Denver)Status
00:00 Thu15:00 WedMST working
01:00 Thu16:00 WedMST working
02:00 Thu17:00 WedOff-hours both sides
03:00 Thu18:00 WedOff-hours both sides
04:00 Thu19:00 WedOff-hours both sides
05:00 Thu20:00 WedOff-hours both sides
06:00 Thu21:00 WedOff-hours both sides
07:00 Thu22:00 WedOff-hours both sides
08:00 Thu23:00 WedOff-hours both sides
09:00 Thu00:00 ThuARBT working
10:00 Thu01:00 ThuARBT working
11:00 Thu02:00 ThuARBT working
12:00 Thu03:00 ThuARBT working
13:00 Thu04:00 ThuARBT working
14:00 Thu05:00 ThuARBT working
15:00 Thu06:00 ThuARBT working
16:00 Thu07:00 ThuARBT working
17:00 Thu08:00 ThuOff-hours both sides
18:00 Thu09:00 ThuMST working
19:00 Thu10:00 ThuMST working
20:00 Thu11:00 ThuMST working
21:00 Thu12:00 ThuMST working
22:00 Thu13:00 ThuMST working
23:00 Thu14:00 ThuMST working

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

Arabia Standard Time (ARBT)
IANA identifier
Asia/Riyadh
Current UTC offset
UTC+03:00
Current abbreviation
GMT+3
Major cities in this zone
RiyadhJeddah
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 Riyadh and Denver

Riyadh
Sunrise
05:11
Sunset
18:30
Solar noon
11:50
Daylight
13h 18m
Denver
Sunrise
05:48
Sunset
20:06
Solar noon
12:57
Daylight
14h 18m

Related converters

MST to ARBT (reverse)ARBT to ESTARBT to PSTARBT to GMTARBT to UTCARBT to CETEST to MSTPST to MSTGMT to MSTUTC to MSTCET to MST
Looking for local time? See time in Riyadh or time in Denver.

Frequently asked questions

What is the time difference between ARBT and MST right now?+
MST (Mountain Standard Time) is currently 9 hours behind ARBT (Arabia Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does ARBT or MST observe daylight saving time?+
ARBT: does not observe daylight saving time. MST: observes daylight saving time.
When is the best time to schedule a meeting between ARBT and MST?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 17:00–18:00 ARBT (08:00–09:00 MST).
What time is it in Denver when it is 12:00 noon in Riyadh?+
When it is 12:00 Thu in Riyadh (ARBT), it is 03:00 Thu in Denver (MST).
Which IANA time zone identifiers are used for ARBT and MST?+
ARBT maps to "Asia/Riyadh" 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 Riyadh ahead of or behind Denver?+
Whether Riyadh (ARBT) is ahead of or behind Denver (MST) depends on the current UTC offsets. Right now MST is 9 hours behind ARBT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for ARBT and MST?+
ARBT 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 ARBT and MST?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between ARBT and MST is 17:00–18:00 ARBT.