3 PM MST to EST
3 PM MST is 5 PM EST. That is close of business on the East Coast.
Eastern Time is always 2 hours ahead of Mountain Time. To check a different minute use the live time converter.
If your shift is 7 AM to 3 PM MT that is 9 AM to 5 PM ET. Your day lines up with a standard East Coast workday.
3 PM Mountain Time in Eastern Time
| Season & Location | Equivalent Time |
|---|---|
| Winter, Denver (MST to EST) | 5:00 PM EST |
| Summer, Denver (MDT to EDT) | 5:00 PM EDT |
| Phoenix in summer (MST to EDT) | 6:00 PM EDT |
| UTC in winter | 22:00 |
| UTC in summer | 21:00 |
Denver and New York always change clocks on the same day.
Need it in reverse? 5 PM EST is 3 PM MST. The reverse EST to MST tool handles any other Eastern time.
Nearby times
| Mountain Time (MST) | Eastern Time (EST) |
|---|---|
| 3:00 PM MST | 5:00 PM EST |
| 3:15 PM MST | 5:15 PM EST |
| 3:30 PM MST | 5:30 PM EST |
| 3:45 PM MST | 5:45 PM EST |
What 5 PM Eastern means
When a New York client asks for something "by COB" they usually mean 5 PM Eastern. For you in Denver that is 3 PM. Mountain teams still have about two working hours left but the people they need on the East Coast are signing off. Send anything that needs a same-day reply before this time. For live calls that suit both sides aim for 9 AM to 1 PM Mountain. The overlap hours planner shows the full window.
Arizona
Phoenix and Tucson do not use daylight saving time. So 3 PM in Phoenix is 5 PM Eastern in winter and 6 PM Eastern in summer. The Navajo Nation is the exception because it follows Denver. More on the Arizona to Eastern time rules.
Daylight saving time
The switch to MDT and EDT does not change this answer. Both zones move their clocks together so 3 PM Mountain stays 5 PM Eastern in summer. See how daylight saving affects MST to EST.
3 PM MST to EST FAQ
What does COB mean for a Mountain Time team?
COB means close of business. For an East Coast client it usually means 5 PM Eastern. That is 3 PM Mountain.
What is 3 PM Arizona time in Eastern Time?
It is 5 PM Eastern in winter. It is 6 PM Eastern in summer when New York is on EDT and Arizona stays on MST.
What is 5 PM EST in Mountain Time?
5 PM EST is 3 PM MST. In summer 5 PM EDT is 3 PM MDT.
Is 3 PM MST the same as 3 PM MT?
In winter it is. MT is the general name for Mountain Time. In summer most of the zone uses MDT and 3 PM MDT is still 5 PM Eastern.
Earlier: 2 PM MST to EST. Later: 4 PM MST to EST. For every hour see the MST to EST chart for all 24 hours.
Related Tools & Time Zone Guides
Explore specialized converters and scheduling calculators for Mountain and Eastern Time.
Full Conversion Table
Browse all 24 hours side-by-side with 12h/24h toggle and day-shift markers.
Daylight Saving Time (DST) Rules
Check transition dates for 2024-2027 and MDT vs EDT rules.