Time zone converter

EST to MST

On Oct 23, 2026, Mountain Time is 2 hours behind Eastern Time: 9:00 AM EDT is 7:00 AM MDT. The gap changes during the year because of daylight saving time; the dates are below.

Eastern Time
--:--
Current time in Eastern Time
Mountain Time
--:--
Current time in Mountain Time
Pick a date and time to convert.

MST vs EST over the next 12 months

PeriodMST isExample
Oct 23, 2026 to Nov 1, 20262 hours behind9:00 AM EDT = 7:00 AM MDT
Nov 1, 2026 to Nov 1, 20261 hour behind9:00 AM EST = 7:00 AM MST
Nov 1, 2026 to Mar 14, 20272 hours behind9:00 AM EST = 7:00 AM MST
Mar 14, 2027 to Mar 14, 20273 hours behind9:00 AM EDT = 7:00 AM MDT
Mar 14, 2027 onwards2 hours behind9:00 AM EDT = 7:00 AM MDT

EST to MST conversion table

Every hour of a weekday around Oct 23, 2026, in both zones.

Eastern TimeMountain Time
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

Best time for a meeting

Normal 9-to-5 working hours overlap for 6 hours on a weekday: 11:00 AM–5:00 PM EDT, which is 9:00 AM–3:00 PM MDT.

Comparing more than two places? The meeting planner lines up working hours for up to six cities.

Daylight saving time

Eastern Time (EST/EDT)

  • Nov 1, 2026: clocks go back 1 hour at 2:00 AM (UTC−4 → UTC−5)
  • Mar 14, 2027: clocks go forward 1 hour at 2:00 AM (UTC−5 → UTC−4)

Mountain Time (MST/MDT)

  • Nov 1, 2026: clocks go back 1 hour at 2:00 AM (UTC−6 → UTC−7)
  • Mar 14, 2027: clocks go forward 1 hour at 2:00 AM (UTC−7 → UTC−6)

Where these clocks are used

  • Eastern Time (EST/EDT): New York, Toronto, Miami, Atlanta. IANA zone America/New_York.
  • Mountain Time (MST/MDT): Denver, Salt Lake City, Calgary. IANA zone America/Denver.

Questions

What time is it in MST when it is 9 AM EST?

On Oct 23, 2026, 9:00 AM EDT is 7:00 AM MDT. On other dates the answer can shift by an hour because of daylight saving time; the table of periods on this page gives each one.

How many hours behind EST is MST?

It depends on the date. Oct 23, 2026 to Nov 1, 2026: MST is 2 hours behind. Nov 1, 2026 to Nov 1, 2026: MST is 1 hour behind. Nov 1, 2026 to Mar 14, 2027: MST is 2 hours behind. Mar 14, 2027 to Mar 14, 2027: MST is 3 hours behind. Mar 14, 2027 onwards: MST is 2 hours behind.

Do EST and MST observe daylight saving time?

Eastern Time switches to EDT (UTC−4) in summer and back to EST (UTC−5) in winter. Mountain Time switches to MDT (UTC−6) in summer and back to MST (UTC−7) in winter.

What is the best time for a meeting between EST and MST?

Normal 9-to-5 working hours overlap for 6 hours on a weekday: 11:00 AM–5:00 PM EDT, which is 9:00 AM–3:00 PM MDT.

Scheduling across time zones? Share one Caly booking link and every guest sees your free times in their own zone. Try Caly free

Related conversions

Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.