Timezone converter
EST to MST currently uses Eastern Time in America/New_York and Mountain Time in America/Phoenix as the live reference pair, with a -2h live gap. EST to MST matters whenever New York City and Phoenix need to coordinate across a -2h gap. The EST side covers United States and Canada, while MST covers United States and Mexico — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.
Offset math, DST behavior, and city coverage on both sides are refreshed from the live timezone dataset during the page revalidation window.
From
Eastern Time
America/New_York · EST -05:00
Major markets in this grouping include New York City, Toronto, Brooklyn, Queens.
To
Mountain Time
America/Phoenix · MST -07:00
Major markets in this grouping include Phoenix, Ciudad Juárez, Calgary, Edmonton.
Current gap
-2h
EST -05:00 vs MST -07:00
9-to-5 overlap
6h
EST 11:00 AM previous day to 5:00 PM previous day
Representative countries
United States, Canada, and Haiti / United States, Mexico, and Canada
Based on the busiest city and zone usage found in the current dataset.
EST (New York City, -05:00) to MST (Phoenix, -07:00) is currently a -2h conversion. Live coverage on the EST side is anchored by New York City, Toronto, Brooklyn, and Queens; the MST side draws from Phoenix, Ciudad Juárez, Calgary, and Edmonton.
EST to MST matters whenever New York City and Phoenix need to coordinate across a -2h gap. The EST side covers United States and Canada, while MST covers United States and Mexico — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.
Both reference zones sit inside America, so this is a regional comparison rather than a long-haul conversion. The gap of -2h mostly affects intra-continental travel, regional logistics, and America-wide calendars.
EST follows seasonal clock changes through America/New_York, while MST stays on a fixed offset year-round. That asymmetry is the real differentiator on this page: the gap widens or narrows by an hour twice a year, so calendar invites scheduled in one season often look wrong in the other.
EST and MST sit exactly 2h apart, leaving a generous 6h of shared 9-to-5 time. With that much overlap, this pair behaves almost like a single workday, so meeting times are negotiable rather than forced into a narrow corner of the calendar.
Reference zone, current offsets, country and city anchors, overlap math, and date-shift answers for EST to MST.
Reference pair
America/New_York -> America/Phoenix
Live offsets
EST -05:00 vs MST -07:00
Meaning split
Eastern Time / Mountain Time
Country anchors
United States, Canada, and Haiti -> United States, Mexico, and Canada
City anchors
New York City, Toronto, Brooklyn, Queens -> Phoenix, Ciudad Juárez, Calgary, Edmonton
Workday overlap
6h window: EST 11:00 AM previous day-5:00 PM previous day
Morning answer
9 AM EST = 7:00 AM MST, same day
Evening answer
6 PM EST = 4:00 PM MST, same day
Same-offset labels can share the same hour while still landing in different countries, calendars, cities, and workday windows. These notes show the practical context behind this conversion.
EST to MST is pinned to America/New_York -> America/Phoenix, with the shorthand labels shown as context. The city anchors are New York City, Toronto, Brooklyn, Queens on the EST side and Phoenix, Ciudad Juárez, Calgary, Edmonton on the MST side, with -2h between the live reference zones.
The 12 popular-hour answers include 12 same-day conversions, 0 next-day conversions, and 0 previous-day conversions. That distribution is what separates this page from a static offset chart.
Nearby labels sharing a current offset include EDT (From side), MDT (To side), GMT-7 (To side), YT (To side). They may match mathematically, but their country calendars, city anchors, and common search intent differ from this exact pair.
EST: United States (US); 1508 mapped cities; capital Washington, D.C.; English; USD United States dollar | EST: Canada (CA); 310 mapped cities; capital Ottawa; English, French; CAD Canadian dollar | EST: Haiti (HT); 30 mapped cities; capital Port-au-Prince; French, Haitian Creole; HTG Haitian gourde | EST: Jamaica (JM); 11 mapped cities; capital Kingston; English, Jamaican Patois; JMD Jamaican dollar | EST: Mexico (MX); 6 mapped cities; capital Mexico City; Spanish; MXN Mexican peso | MST: United States (US); 187 mapped cities; capital Washington, D.C.; English; USD United States dollar | MST: Mexico (MX); 1 mapped cities; capital Mexico City; Spanish; MXN Mexican peso | MST: Canada (CA); 34 mapped cities; capital Ottawa; English, French; CAD Canadian dollar
Offset behavior, DST gap changes, local calendar evidence, and the day-shift pattern across the most common conversion hours.
EST/MST is a short-haul offset gap: America/New_York currently reads -05:00, America/Phoenix reads -07:00, and the live delta is -2h. This class decides whether the page behaves like a same-day planner or a handoff planner.
America/New_York changes from -05:00 (EST) to -04:00 (EDT) on March 14, 2027 at about 3:00 AM.
No country holiday snapshot is attached to this exact pair yet, so the page leans on city anchors, IANA zones, offsets, and the live conversion table instead of pretending a local calendar exists.
Across the 12 popular-hour answers, this pair has 12 same-day answers, 0 next-day answers, 0 previous-day answers. That mix is specific to the current America/New_York -> America/Phoenix relationship and helps users see whether dates must be written explicitly in invites, travel plans, and release schedules.
Same-offset converter clusters can look identical if the page only shows a numeric offset. This audit states whether the route should be indexed, which canonical peer it follows when consolidated, and what pair-specific evidence keeps the page useful.
This pair remains indexable because the route has enough pair-specific context: America/New_York -> America/Phoenix, country anchors, city anchors, calendar notes, and day-shift examples.
EST and MST are not currently a same-offset pair; the live delta is -2h. Same-offset neighbors are still listed because users often confuse nearby abbreviations.
EDT (From side, -05:00), MDT (To side, -07:00), GMT-7 (To side, -07:00), YT (To side, -07:00) The page keeps these labels visible so SGT/HKT/GST-style clusters do not blur into one generic offset page.
EST/MST uses 12 same-day answers, 0 next-day answers, 0 previous-day answers; 6h strict workday overlap; source zones America/New_York and America/Phoenix; country anchors United States, Canada, and Haiti -> United States, Mexico, and Canada.
Common places, calendars, markets, languages, and operating contexts behindEST and MST.
MST
MST is Mountain Standard Time, but the label is risky because North American Mountain-region cities do not all behave the same year-round. Denver-style locations can move to MDT while Arizona-style planning often stays on standard time.
MST
MST conversions should be pinned to the representative IANA zone before use. The practical context can involve Arizona, the US Mountain region, Canada or Mexico-facing schedules, outdoor tourism, sports broadcasts, and cross-border operations.
Same-offset conversions can still land in different public-holiday, language, currency, and city-anchor contexts. These rows use the country profile and holiday snapshots behind each side of the pair.
EST
1,508 mapped city anchors; zones America/New_York.capital Washington, D.C.; English; USD United States dollar
Holiday snapshot: New Year's Day (Jan 1, Public) · Martin Luther King, Jr. Day (Jan 19, Public) · Lincoln's Birthday (Feb 12, Observance) · Presidents Day (Feb 16, Public) · Good Friday (Apr 3, Public)
EST
310 mapped city anchors; zones America/Atikokan, America/Toronto.capital Ottawa; English, French; CAD Canadian dollar
Holiday snapshot: New Year's Day (Jan 1, Public) · Louis Riel Day (Feb 16, Public) · Islander Day (Feb 16, Public) · Heritage Day (Feb 16, Public) · Family Day (Feb 16, Public)
EST
30 mapped city anchors; zones America/Port-au-Prince.capital Port-au-Prince; French, Haitian Creole; HTG Haitian gourde
Holiday snapshot: New Year's Day (Jan 1, Public) · Ancestry Day (Jan 2, Public) · Epiphany (Jan 6, Public) · Carnival (Feb 16, Public) · Carnival (Feb 17, Public)
EST
11 mapped city anchors; zones America/Jamaica.capital Kingston; English, Jamaican Patois; JMD Jamaican dollar
Holiday snapshot: New Year's Day (Jan 1, Public) · Ash Wednesday (Feb 18, Public) · Good Friday (Apr 3, Public) · Easter Monday (Apr 6, Public) · Labour Day (May 23, Public)
EST
6 mapped city anchors; zones America/Cancun.capital Mexico City; Spanish; MXN Mexican peso
Holiday snapshot: New Year's Day (Jan 1, Public) · Constitution Day (Feb 2, Public) · Benito Juárez's birthday (Mar 16, Public) · Maundy Thursday (Apr 2, Bank) · Good Friday (Apr 3, Bank)
MST
187 mapped city anchors; zones America/Phoenix, America/Denver.capital Washington, D.C.; English; USD United States dollar
Holiday snapshot: New Year's Day (Jan 1, Public) · Martin Luther King, Jr. Day (Jan 19, Public) · Lincoln's Birthday (Feb 12, Observance) · Presidents Day (Feb 16, Public) · Good Friday (Apr 3, Public)
These are the labels most likely to be confused with either side of this conversion. A matching UTC offset does not mean the same country, calendar, market, source convention, or user intent.
EST and EDT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
EST and EEST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
EST and EET are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
EST and AEDT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
EST and AEST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
EST and WIT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
MST and MDT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
MST and GMT-7 match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
MST and YT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
MST and CDT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
MST and GALT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
MST and PDT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
Abbreviations with the same UTC offset can still represent different countries, cities, currencies, languages, and civil-time histories. This roster keeps theEST to MST page grounded in those concrete places.
EST: United States (US); 1508 mapped cities; zones America/New York; city anchors New York City (America/New_York, pop 8,804,190), Brooklyn (America/New_York, pop 2,736,074), Queens (America/New_York, pop 2,316,841), Philadelphia (America/New_York, pop 1,573,916); official United States of America; capital Washington, D.C.; region Americas; subregion North America; population 340,110,988; area 9,525,067 km2; languages English; currency USD United States dollar.
EST: Canada (CA); 310 mapped cities; zones America/Atikokan, America/Toronto; city anchors Toronto (America/Toronto, pop 2,794,356), Montréal (America/Toronto, pop 1,762,949), Ottawa (America/Toronto, pop 1,017,449), Mississauga (America/Toronto, pop 717,961); official Canada; capital Ottawa; region Americas; subregion North America; population 41,651,653; area 9,984,670 km2; languages English, French; currency CAD Canadian dollar.
EST: Haiti (HT); 30 mapped cities; zones America/Port-au-Prince; city anchors Port-au-Prince (America/Port-au-Prince, pop 1,234,742), Carrefour (America/Port-au-Prince, pop 442,156), Delmas (America/Port-au-Prince, pop 382,920), Port-de-Paix (America/Port-au-Prince, pop 306,217); official Republic of Haiti; capital Port-au-Prince; region Americas; subregion Caribbean; population 11,867,032; area 27,750 km2; languages French, Haitian Creole; currency HTG Haitian gourde.
EST: Jamaica (JM); 11 mapped cities; zones America/Jamaica; city anchors Kingston (America/Jamaica, pop 937,700), New Kingston (America/Jamaica, pop 583,958), Spanish Town (America/Jamaica, pop 145,018), Portmore (America/Jamaica, pop 102,861); official Jamaica; capital Kingston; region Americas; subregion Caribbean; population 2,825,544; area 10,991 km2; languages English, Jamaican Patois; currency JMD Jamaican dollar.
EST: Mexico (MX); 6 mapped cities; zones America/Cancun; city anchors Cancún (America/Cancun, pop 888,797), Chetumal (America/Cancun, pop 169,028), Playa del Carmen (America/Cancun, pop 149,923), Cozumel (America/Cancun, pop 77,236); official United Mexican States; capital Mexico City; region Americas; subregion North America; population 130,575,786; area 1,964,375 km2; languages Spanish; currency MXN Mexican peso.
MST: United States (US); 187 mapped cities; zones America/Phoenix, America/Denver; city anchors Phoenix (America/Phoenix, pop 1,650,070), Denver (America/Denver, pop 729,019), El Paso (America/Denver, pop 678,815), Albuquerque (America/Denver, pop 564,559); official United States of America; capital Washington, D.C.; region Americas; subregion North America; population 340,110,988; area 9,525,067 km2; languages English; currency USD United States dollar.
MST: Mexico (MX); 1 mapped cities; zones America/Ciudad Juarez; city anchors Ciudad Juárez (America/Ciudad_Juarez, pop 1,512,450); official United Mexican States; capital Mexico City; region Americas; subregion North America; population 130,575,786; area 1,964,375 km2; languages Spanish; currency MXN Mexican peso.
MST: Canada (CA); 34 mapped cities; zones America/Edmonton; city anchors Calgary (America/Edmonton, pop 1,306,784), Edmonton (America/Edmonton, pop 1,010,899), Lethbridge (America/Edmonton, pop 103,197), Red Deer (America/Edmonton, pop 100,844); official Canada; capital Ottawa; region Americas; subregion North America; population 41,651,653; area 9,984,670 km2; languages English, French; currency CAD Canadian dollar.
Same-offset converter pages can look deceptively alike. These records pin the page to the exact abbreviations, IANA zones, countries, and city anchors behind EST and MST.
EST (est) is not marked ambiguous in the abbreviation catalog. Meaning records: Eastern Time at UTC-05:00; listed zones America/Atikokan; America/Cancun; America/Cayman; America/Jamaica; America/Panama; America/Nassau; America/New York; America/Port-au-Prince; America/Grand Turk; America/Toronto; source label Eastern Time - Atikokan.
EST currently maps to 8 country footprints in the converter dataset: United States (US), Canada (CA), Haiti (HT), Jamaica (JM), Mexico (MX), Panama (PA), Bahamas (BS), Cayman Islands (KY). The footprint spans 9 IANA zones across 10 city anchors.
EST city anchors in this indexed page family: New York City [new-york-city-US, US, America/New_York, pop 8,804,190]; Toronto [toronto-CA, CA, America/Toronto, pop 2,794,356]; Brooklyn [brooklyn-US, US, America/New_York, pop 2,736,074]; Queens [queens-US, US, America/New_York, pop 2,316,841]; Montréal [montreal-CA, CA, America/Toronto, pop 1,762,949]; Philadelphia [philadelphia-US, US, America/New_York, pop 1,573,916]; Manhattan [manhattan-5125771-US, US, America/New_York, pop 1,487,536]; The Bronx [the-bronx-US, US, America/New_York, pop 1,385,108]; Port-au-Prince [port-au-prince-HT, HT, America/Port-au-Prince, pop 1,234,742]; Ottawa [ottawa-CA, CA, America/Toronto, pop 1,017,449].
EST: United States (US); 1508 mapped cities; zones America/New York; city anchors New York City (America/New_York, pop 8,804,190), Brooklyn (America/New_York, pop 2,736,074), Queens (America/New_York, pop 2,316,841), Philadelphia (America/New_York, pop 1,573,916); official United States of America; capital Washington, D.C.; region Americas; subregion North America; population 340,110,988; area 9,525,067 km2; languages English; currency USD United States dollar. EST: Canada (CA); 310 mapped cities; zones America/Atikokan, America/Toronto; city anchors Toronto (America/Toronto, pop 2,794,356), Montréal (America/Toronto, pop 1,762,949), Ottawa (America/Toronto, pop 1,017,449), Mississauga (America/Toronto, pop 717,961); official Canada; capital Ottawa; region Americas; subregion North America; population 41,651,653; area 9,984,670 km2; languages English, French; currency CAD Canadian dollar. EST: Haiti (HT); 30 mapped cities; zones America/Port-au-Prince; city anchors Port-au-Prince (America/Port-au-Prince, pop 1,234,742), Carrefour (America/Port-au-Prince, pop 442,156), Delmas (America/Port-au-Prince, pop 382,920), Port-de-Paix (America/Port-au-Prince, pop 306,217); official Republic of Haiti; capital Port-au-Prince; region Americas; subregion Caribbean; population 11,867,032; area 27,750 km2; languages French, Haitian Creole; currency HTG Haitian gourde. EST: Jamaica (JM); 11 mapped cities; zones America/Jamaica; city anchors Kingston (America/Jamaica, pop 937,700), New Kingston (America/Jamaica, pop 583,958), Spanish Town (America/Jamaica, pop 145,018), Portmore (America/Jamaica, pop 102,861); official Jamaica; capital Kingston; region Americas; subregion Caribbean; population 2,825,544; area 10,991 km2; languages English, Jamaican Patois; currency JMD Jamaican dollar. EST: Mexico (MX); 6 mapped cities; zones America/Cancun; city anchors Cancún (America/Cancun, pop 888,797), Chetumal (America/Cancun, pop 169,028), Playa del Carmen (America/Cancun, pop 149,923), Cozumel (America/Cancun, pop 77,236); official United Mexican States; capital Mexico City; region Americas; subregion North America; population 130,575,786; area 1,964,375 km2; languages Spanish; currency MXN Mexican peso.
MST (mst) is not marked ambiguous in the abbreviation catalog. Meaning records: Mountain Time at UTC-07:00; listed zones America/Phoenix; America/Edmonton; America/Ciudad Juarez; America/Denver; source label Mountain Time - Phoenix, Tucson, Mesa, Chandler.
MST currently maps to 3 country footprints in the converter dataset: United States (US), Mexico (MX), Canada (CA). The footprint spans 4 IANA zones across 10 city anchors.
MST city anchors in this indexed page family: Phoenix [phoenix-US, US, America/Phoenix, pop 1,650,070]; Ciudad Juárez [ciudad-juarez-MX, MX, America/Ciudad_Juarez, pop 1,512,450]; Calgary [calgary-CA, CA, America/Edmonton, pop 1,306,784]; Edmonton [edmonton-CA, CA, America/Edmonton, pop 1,010,899]; Denver [denver-US, US, America/Denver, pop 729,019]; El Paso [el-paso-US, US, America/Denver, pop 678,815]; Albuquerque [albuquerque-US, US, America/Denver, pop 564,559]; Tucson [tucson-US, US, America/Phoenix, pop 542,629]; Mesa [mesa-US, US, America/Phoenix, pop 471,825]; Colorado Springs [colorado-springs-US, US, America/Denver, pop 456,568].
MST: United States (US); 187 mapped cities; zones America/Phoenix, America/Denver; city anchors Phoenix (America/Phoenix, pop 1,650,070), Denver (America/Denver, pop 729,019), El Paso (America/Denver, pop 678,815), Albuquerque (America/Denver, pop 564,559); official United States of America; capital Washington, D.C.; region Americas; subregion North America; population 340,110,988; area 9,525,067 km2; languages English; currency USD United States dollar. MST: Mexico (MX); 1 mapped cities; zones America/Ciudad Juarez; city anchors Ciudad Juárez (America/Ciudad_Juarez, pop 1,512,450); official United Mexican States; capital Mexico City; region Americas; subregion North America; population 130,575,786; area 1,964,375 km2; languages Spanish; currency MXN Mexican peso. MST: Canada (CA); 34 mapped cities; zones America/Edmonton; city anchors Calgary (America/Edmonton, pop 1,306,784), Edmonton (America/Edmonton, pop 1,010,899), Lethbridge (America/Edmonton, pop 103,197), Red Deer (America/Edmonton, pop 100,844); official Canada; capital Ottawa; region Americas; subregion North America; population 41,651,653; area 9,984,670 km2; languages English, French; currency CAD Canadian dollar.
EST is a North or South American civil-time label, currently 5h behind UTC at -05:00. The label covers 10 IANA zones across 9 countries, with New York City as the busiest live reference. The busiest cities using EST in the current catalog are New York City, Toronto, Brooklyn, Queens, and Montréal. The lead live reference on this page is New York City (America/New_York), currently at -05:00 (EST). Those cities are what give EST its actual feel rather than the abstract offset. EST currently shows -05:00, but America/New_York observes seasonal clock changes — the next transition is around March 14, 2027. That means the offset on this page is a snapshot, not a permanent fact, so long-range scheduling should pin the underlying IANA zone instead of the abbreviation.
EST reads cleanly across the Americas in this dataset, but the same letters can mean different things elsewhere (notably CST, EST, and IST overlap with non-American labels). Pin the IANA zone when the audience is international. America/New_York has an upcoming offset change on March 14, 2027. After that point, EST on this page will read a different UTC offset until the next transition, so any saved timestamp should anchor to the IANA zone rather than the abbreviation. For precise work, the safest equivalent of EST is the exact IANA zone used by your city or system. America/New_York sits at -05:00, behind UTC, which means daily logs in this zone reach a new calendar date after UTC does — relevant for date-aligned reports and billing cutoffs.
EST should not be blindly swapped with nearby labels. Adjacent references in the catalog: EDT (-05:00, Shares the eastern time family); EEST (+02:00, Shares the eastern time family); EET (+02:00, Shares the eastern time family); AEDT (+11:00, Shares the eastern time family); AEST (+11:00, Shares the eastern time family); WIT (+09:00, Shares the eastern time family).
EST has 1 meaning record, offset range UTC-05:00 to UTC-04:00, labels Eastern Time, and 9 country footprints across 10 IANA zones.
MST is a North or South American civil-time label, currently 7h behind UTC at -07:00. The label covers 4 IANA zones across 3 countries, with Phoenix as the busiest live reference. The busiest cities using MST in the current catalog are Phoenix, Ciudad Juárez, Calgary, Edmonton, and Denver. The lead live reference on this page is Phoenix (America/Phoenix), currently at -07:00 (MST). Those cities are what give MST its actual feel rather than the abstract offset. MST is stable on America/Phoenix year-round, with no seasonal clock changes in the next year. That makes it a low-friction choice for recurring meetings and broadcast schedules — but software still prefers the IANA zone because governments can change civil-time rules independently of the short code.
MST reads cleanly across the Americas in this dataset, but the same letters can mean different things elsewhere (notably CST, EST, and IST overlap with non-American labels). Pin the IANA zone when the audience is international. America/Phoenix does not show an offset change in the next year, which makes MST predictable for short-term scheduling. Predictable is not the same as permanent — civil-time rules still get changed by governments on relatively short notice. For precise work, the safest equivalent of MST is the exact IANA zone used by your city or system. America/Phoenix sits at -07:00, behind UTC, which means daily logs in this zone reach a new calendar date after UTC does — relevant for date-aligned reports and billing cutoffs.
MST should not be blindly swapped with nearby labels. Adjacent references in the catalog: MDT (-07:00, Shares the mountain time family); GMT-7 (-07:00, Currently sits on the same UTC offset); YT (-07:00, Currently sits on the same UTC offset); CDT (-06:00, Runs on a nearby UTC offset); GALT (-06:00, Runs on a nearby UTC offset); PDT (-08:00, Runs on a nearby UTC offset).
MST has 1 meaning record, offset range UTC-07:00 to UTC-06:00, labels Mountain Time, and 3 country footprints across 4 IANA zones.
EST country anchor United States: The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 341 million. Source: Wikipedia.
MST country anchor United States: The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 341 million. Source: Wikipedia.
MST is Mountain Standard Time, but the label is risky because North American Mountain-region cities do not all behave the same year-round. Denver-style locations can move to MDT while Arizona-style planning often stays on standard time.
MST conversions should be pinned to the representative IANA zone before use. The practical context can involve Arizona, the US Mountain region, Canada or Mexico-facing schedules, outdoor tourism, sports broadcasts, and cross-border operations.
EST/MST uses America/New_York -> America/Phoenix, offset delta -2h, overlap 6h, route /convert/est/mst/, and live abbreviation readings EST/MST.
EST coverage on this page is led by New York City, United States, Toronto, Canada, Brooklyn, United States, and Queens, United States, with 2 more in the live dataset. That mix is what makes EST feel anchored to East Coast and Central American business activity in practice rather than just an abbreviation on a chart.
MST coverage is led by Phoenix, United States, Ciudad Juárez, Mexico, Calgary, Canada, and Edmonton, Canada, with 2 more anchoring the wider label family. Combined with the EST side, this conversion ends up describing intra-America regional logistics and travel coordination.
Adjust the time. Digits roll like an odometer, and the swap button flips the zones.
Same day in both places.
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| EST | MST | Day relation |
|---|---|---|
| 9:00 AM | 7:00 AMThu, Nov 5 | same day |
| 12:00 PM | 10:00 AMThu, Nov 5 | same day |
| 3:00 PM | 1:00 PMThu, Nov 5 | same day |
| 6:00 PM | 4:00 PMThu, Nov 5 | same day |
| 9:00 PM | 7:00 PMThu, Nov 5 | same day |
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| MST | EST | Day relation |
|---|---|---|
| 9:00 AM | 11:00 AMThu, Nov 5 | same day |
| 12:00 PM | 2:00 PMThu, Nov 5 | same day |
| 3:00 PM | 5:00 PMThu, Nov 5 | same day |
| 6:00 PM | 8:00 PMThu, Nov 5 | same day |
| 9:00 PM | 11:00 PMThu, Nov 5 | same day |
EST to MST ranges from EST 9:00 AM (which lands at MST 7:00 AM) through EST 9:00 PM (MST 7:00 PM). The -2h gap is small enough that EST mornings still reach MST working hours, so most invites scheduled in EST land cleanly without confusing the MST recipient.
MST to EST ranges from MST 9:00 AM (which lands at EST 11:00 AM) through MST 9:00 PM (EST 11:00 PM). The -2h gap is small enough that MST mornings still reach EST working hours, so most invites scheduled in MST land cleanly without confusing the EST recipient.
These direct answers are here for the exact-intent searches people actually use, like “10 AM EST to MST” or “4 PM EST in MST”.
8 AM EST = 6:00 AM MST (06:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
9 AM EST = 7:00 AM MST (07:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
10 AM EST = 8:00 AM MST (08:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
11 AM EST = 9:00 AM MST (09:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
12 PM EST = 10:00 AM MST (10:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
1 PM EST = 11:00 AM MST (11:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
2 PM EST = 12:00 PM MST (12:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
3 PM EST = 1:00 PM MST (13:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
4 PM EST = 2:00 PM MST (14:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
5 PM EST = 3:00 PM MST (15:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
6 PM EST = 4:00 PM MST (16:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
9 PM EST = 7:00 PM MST (19:00). On today's live calendar that lands on Thu, Nov 5 in MST, which means the answer is a same day conversion rather than a static offset lookup.
The live gap is -2h right now, based on America/New_York at -05:00 and America/Phoenix at -07:00. America/New_York changes offset on March 14, 2027, so the gap moves to -3h after that transition.
The most usable workday block right now is about 6 hours: EST 11:00 AM previous day to 5:00 PM previous day, which lines up with MST 9:00 AM previous day to 3:00 PM previous day.
America/New_York
EST · -05:00
America/Phoenix
MST · -07:00
These are the busiest live references selected from the abbreviation families on this page.
| EST | MST |
|---|---|
| 19:00 | 17:00 |
| 20:00 | 18:00 |
| 21:00 | 19:00 |
| 22:00 | 20:00 |
| 23:00 | 21:00 |
| 00:00 | 22:00 |
| 01:00 | 23:00 |
| 02:00 | 00:00 |
| 03:00 | 01:00 |
| 04:00 | 02:00 |
| 05:00 | 03:00 |
| 06:00 | 04:00 |
| 07:00 | 05:00 |
| 08:00 | 06:00 |
| 09:00 | 07:00 |
| 10:00 | 08:00 |
| 11:00 | 09:00 |
| 12:00 | 10:00 |
| 13:00 | 11:00 |
| 14:00 | 12:00 |
| 15:00 | 13:00 |
| 16:00 | 14:00 |
| 17:00 | 15:00 |
| 18:00 | 16:00 |
Countries represented here include United States, Canada, and Haiti.
Countries represented here include United States, Mexico, and Canada.
Once a conversion pair matters, people usually need a city page, compare page, or a broader browse surface next.
Interactive converter
Move from this static pair into the full timezone converter with more cities and abbreviations.
Compare city pairs
Use compare pages when the practical question is overlap, not just offset arithmetic.
World clock
Open live city clocks after narrowing the timezone pair you care about.
Browse city pages
Jump into the strongest city pages when you want location-specific timezone context.
