HubTools

EST to MST

Convert New York time (EST) to Denver time (MST). DST-aware via IANA. Live, free, no signup.

Converting EST to MST

Converting time from EST (New York, US East) to MST (Denver, US Mountain) means adjusting for the offset between the two zones — and that offset can shift by an hour twice a year because New York and Denver may observe Daylight Saving Time on different schedules. The converter below uses the IANA time-zone database (America/New_York ↔ America/Denver), which carries the full DST history and ruleset. Type a time in either side, pick the date, and the matching local time on the other side updates with the correct offset for that exact day. Need to compare more than these two zones? Open the full Time Zone Converter to add up to 6 zones at once, or use the Unix Timestamp Converter for epoch-to-date arithmetic across zones.
Date
● Live
Zones
EST · New York
GMT-4Mon, 2026-05-11
MST · Denver
GMT-6Mon, 2026-05-11
24-hour overlap
Zone01234567891011121314151617181920212223
America/New_York20212223012345678910111213141516171819
America/Denver18192021222301234567891011121314151617
Each cell shows the local hour in that zone. Highlighted cells are standard 9 AM–5 PM business hours; look for columns where every row is highlighted to find shared work-hour windows.

How to use this tool

  1. 1
    Set the date
    DST rules differ between New York and Denver; pick the date you're converting for.
  2. 2
    Type the EST time
    Enter the time you have in EST (or click "Set to now" for the current moment).
  3. 3
    Read the MST time
    The MST row updates instantly with the correct local time and offset tag.
  4. 4
    Find a shared work hour
    Scroll to the 24-hour overlap grid — highlighted columns are 9-to-5 in both zones.

Frequently asked questions

What is the time difference between EST and MST?
The offset between EST (New York) and MST (Denver) is computed for the exact date you select using the browser's IANA time-zone database. Both zones may observe Daylight Saving Time on different schedules, so the gap can shift by an hour twice a year. The converter handles this automatically — type a time in either field and the other side updates with the correct offset for that date.

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