Clockjumper

Timezone conversion

ET to MST Time — Convert Eastern Time (US) to Mountain Standard Time (US)

MST is currently 2 hours behind ET. This offset stays the same all year — neither zone shifts for daylight saving in a way that changes it.

MST is currently 2 hours behind ET.

ET • EDT (UTC-4)
10:31 AM
Thursday, Sep 10
MST • MDT (UTC-6)
8:31 AM
Thursday, Sep 10

Abbreviation disambiguation

On Clockjumper, ET refers to the Eastern Time zone of the United States and Canada. ET is an umbrella name rather than a fixed offset: it means EST (UTC−5) in winter and EDT (UTC−4) in summer, and these pages show whichever is currently in force.

MST is Mountain Standard Time (UTC−7). Most of the US Mountain zone switches to MDT (UTC−6) in summer, but Arizona (except the Navajo Nation) stays on MST year-round.

Interactive converter

From

12:00PM

To

Select both cities to see the converted time.

Pick a time to convert
:

Full ET to MST conversion table

ETMST
12:00 AM10:00 PM(previous day)
1:00 AM11:00 PM(previous day)
2:00 AM12:00 AM
3:00 AM1:00 AM
4:00 AM2:00 AM
5:00 AM3:00 AM
6:00 AM4:00 AM
7:00 AM5:00 AM
8:00 AM6:00 AM
9:00 AM7:00 AM
10:00 AM8:00 AM
11:00 AM9:00 AM
12:00 PM10:00 AM
1:00 PM11:00 AM
2:00 PM12:00 PM
3:00 PM1:00 PM
4:00 PM2:00 PM
5:00 PM3:00 PM
6:00 PM4:00 PM
7:00 PM5:00 PM
8:00 PM6:00 PM
9:00 PM7:00 PM
10:00 PM8:00 PM
11:00 PM9:00 PM

Daylight saving and how the gap changes

The ET → MST offset stays constant across the year — neither zone shifts for daylight saving in a way that changes this gap.

Frequently asked questions

Is MST ahead of or behind ET right now?
MST is currently 2 hours behind ET.
What is the current ET to MST time difference?
Right now the gap is 2 hours — MST is 2 hours behind ET.
Does the ET → MST offset change during the year?
No. Neither Eastern Time (US) nor Mountain Standard Time (US) shifts for daylight saving in a way that changes this offset — the gap is the same all year.
Does ET observe daylight saving time?
Yes — Eastern Time (US) observes DST, so its UTC offset shifts by 1 hour between winter and summer.
Does MST observe daylight saving time?
MST is itself the standard-time form. Mountain Standard Time (US) is in force at UTC-7 through the winter months; outside that window the same zone is on MDT (UTC-6).
What time is 3 AM ET in MST?
3:00 AM ET is 1:00 AM MST.
What time is 8 AM ET in MST?
8:00 AM ET is 6:00 AM MST.
What time is 9 AM ET in MST?
9:00 AM ET is 7:00 AM MST.
What time is 10 AM ET in MST?
10:00 AM ET is 8:00 AM MST.
What time is 11 AM ET in MST?
11:00 AM ET is 9:00 AM MST.
What time is 12 PM (noon) ET in MST?
12:00 PM ET is 10:00 AM MST.
What time is 2 PM ET in MST?
2:00 PM ET is 12:00 PM MST.
What time is 3 PM ET in MST?
3:00 PM ET is 1:00 PM MST.
What time is 4 PM ET in MST?
4:00 PM ET is 2:00 PM MST.
What time is 5 PM ET in MST?
5:00 PM ET is 3:00 PM MST.
What time is 9 PM ET in MST?
9:00 PM ET is 7:00 PM MST.
What time is 10 PM ET in MST?
10:00 PM ET is 8:00 PM MST.
When is the best time to schedule a call between ET and MST?
The working-hours overlap (09:00–17:00 in both zones) runs roughly 11:00 AM – 5:00 PM ET (≈ 6 hours). The midpoint of that window — 2:00 PM ET, 12:00 PM MST — is the safest single slot to propose for a live call.
What time zone does ET refer to?
ET refers to Eastern Time (US) (IANA: America/New_York).
What time zone does MST refer to?
MST refers to Mountain Standard Time (US) (IANA: America/Denver).
Is ET on this page the same as other zones that share the letters "ET"?
On Clockjumper, ET refers to the Eastern Time zone of the United States and Canada. ET is an umbrella name rather than a fixed offset: it means EST (UTC−5) in winter and EDT (UTC−4) in summer, and these pages show whichever is currently in force.
Is MST on this page the same as other zones that share the letters "MST"?
MST is Mountain Standard Time (UTC−7). Most of the US Mountain zone switches to MDT (UTC−6) in summer, but Arizona (except the Navajo Nation) stays on MST year-round.

Related conversions

Learn more