Guides

MST: Mountain Standard Time

MST is UTC−7: 7 hours behind Coordinated Universal Time. The US and Canadian Rocky Mountain region in winter. Most of Arizona, including Phoenix, uses MST all year and does not change clocks.

Current time at UTC−7
MST7:08 AMThu, Oct 22
UTC2:08 PMThu, Oct 22

Calculated from your device clock. Shown at the fixed MST offset, whether or not a particular place is using it today.

Is MST in use right now?

Yes. Denver uses MST all year.

Full name
Mountain Standard Time
UTC offset
UTC−7ISO 8601: -07:00
Type
Standard time, used all year
Summer counterpart
None
Example IANA zone
America/Denver

Where and when MST is used in 2026

Calculated for the cities in our directory from the IANA time zone database. Dates are local; each change happens in the early morning of the date shown.

CityIANA zoneOn MST (UTC−7)
DenverAmerica/DenverJan 1 – Mar 8 and Nov 1 – Dec 31
PhoenixAmerica/PhoenixAll of 2026

MST conversion table

Every hour of the day in MST, converted at fixed offsets. To convert local time in a specific city, use the city instead: its offset may change with the date.

MST (UTC−7)UTC (UTC+0)EST (UTC−5)PST (UTC−8)GMT (UTC+0)IST (UTC+5:30)JST (UTC+9)
12:00 AM7:00 AM2:00 AM11:00 PMprevious day7:00 AM12:30 PM4:00 PM
1:00 AM8:00 AM3:00 AM12:00 AM8:00 AM1:30 PM5:00 PM
2:00 AM9:00 AM4:00 AM1:00 AM9:00 AM2:30 PM6:00 PM
3:00 AM10:00 AM5:00 AM2:00 AM10:00 AM3:30 PM7:00 PM
4:00 AM11:00 AM6:00 AM3:00 AM11:00 AM4:30 PM8:00 PM
5:00 AM12:00 PM7:00 AM4:00 AM12:00 PM5:30 PM9:00 PM
6:00 AM1:00 PM8:00 AM5:00 AM1:00 PM6:30 PM10:00 PM
7:00 AM2:00 PM9:00 AM6:00 AM2:00 PM7:30 PM11:00 PM
8:00 AM3:00 PM10:00 AM7:00 AM3:00 PM8:30 PM12:00 AMnext day
9:00 AM4:00 PM11:00 AM8:00 AM4:00 PM9:30 PM1:00 AMnext day
10:00 AM5:00 PM12:00 PM9:00 AM5:00 PM10:30 PM2:00 AMnext day
11:00 AM6:00 PM1:00 PM10:00 AM6:00 PM11:30 PM3:00 AMnext day
12:00 PM7:00 PM2:00 PM11:00 AM7:00 PM12:30 AMnext day4:00 AMnext day
1:00 PM8:00 PM3:00 PM12:00 PM8:00 PM1:30 AMnext day5:00 AMnext day
2:00 PM9:00 PM4:00 PM1:00 PM9:00 PM2:30 AMnext day6:00 AMnext day
3:00 PM10:00 PM5:00 PM2:00 PM10:00 PM3:30 AMnext day7:00 AMnext day
4:00 PM11:00 PM6:00 PM3:00 PM11:00 PM4:30 AMnext day8:00 AMnext day
5:00 PM12:00 AMnext day7:00 PM4:00 PM12:00 AMnext day5:30 AMnext day9:00 AMnext day
6:00 PM1:00 AMnext day8:00 PM5:00 PM1:00 AMnext day6:30 AMnext day10:00 AMnext day
7:00 PM2:00 AMnext day9:00 PM6:00 PM2:00 AMnext day7:30 AMnext day11:00 AMnext day
8:00 PM3:00 AMnext day10:00 PM7:00 PM3:00 AMnext day8:30 AMnext day12:00 PMnext day
9:00 PM4:00 AMnext day11:00 PM8:00 PM4:00 AMnext day9:30 AMnext day1:00 PMnext day
10:00 PM5:00 AMnext day12:00 AMnext day9:00 PM5:00 AMnext day10:30 AMnext day2:00 PMnext day
11:00 PM6:00 AMnext day1:00 AMnext day10:00 PM6:00 AMnext day11:30 AMnext day3:00 PMnext day

Highlighted rows: 9 am – 5 pm in MST.

What to know about MST

In summer, Denver moves to Mountain Daylight Time (UTC−6), while Phoenix stays on MST (UTC−7). Phoenix then matches Los Angeles rather than Denver.

The Navajo Nation in northeastern Arizona does observe daylight saving, so “Arizona time” is not a single rule.

Read more about why abbreviations need context and how daylight saving changes offsets.

Local time in cities that use MST

Other time zone abbreviations

All time zones →
UTCCoordinated Universal TimeUTC+0GMTGreenwich Mean TimeUTC+0BSTBritish Summer TimeUTC+1CETCentral European TimeUTC+1CESTCentral European Summer TimeUTC+2ESTEastern Standard TimeUTC−5EDTEastern Daylight TimeUTC−4CSTCentral Standard Time (North America)UTC−6CDTCentral Daylight TimeUTC−5PSTPacific Standard TimeUTC−8PDTPacific Daylight TimeUTC−7ISTIndia Standard TimeUTC+5:30JSTJapan Standard TimeUTC+9SGTSingapore TimeUTC+8GSTGulf Standard TimeUTC+4AESTAustralian Eastern Standard TimeUTC+10AEDTAustralian Eastern Daylight TimeUTC+11