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Timezone converter
MST to JST currently uses Mountain Time in America/Phoenix and Japan Time in Asia/Tokyo as the live reference pair, with a +16h live gap. MST to JST matters whenever Phoenix and Tokyo need to coordinate across a +16h gap. The MST side covers United States and Mexico, while JST covers Japan — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.
Last updated recently. Offset math, DST behavior, and city coverage on both sides are refreshed from the live timezone dataset during the page revalidation window.
From
Mountain Time
America/Phoenix · MST -07:00
Major markets in this grouping include Phoenix, Ciudad Juárez, Calgary, Edmonton.
To
Japan Time
Asia/Tokyo · GMT+9 +09:00
Major markets in this grouping include Tokyo, Yokohama, Osaka, Nagoya.
Current gap
+16h
MST -07:00 vs JST +09:00
9-to-5 overlap
No shared block
Meetings usually need an early or late handoff.
Representative countries
United States, Mexico, and Canada / Japan
Based on the busiest city and zone usage found in the current dataset.
MST (Phoenix, -07:00) to JST (Tokyo, +09:00) is currently a +16h conversion. Live coverage on the MST side is anchored by Phoenix, Ciudad Juárez, Calgary, and Edmonton; the JST side draws from Tokyo, Yokohama, Osaka, and Nagoya.
MST to JST matters whenever Phoenix and Tokyo need to coordinate across a +16h gap. The MST side covers United States and Mexico, while JST covers Japan — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.
This pair is trans-Pacific, with one side in the Americas and the other in Asia or Oceania. The +16h gap is large enough that morning on one side reliably overlaps evening on the other, which is why this conversion mostly serves global supply chains, gaming launch schedules, and follow-the-sun engineering.
Neither MST nor JST observes daylight saving on the reference zones used here, so the gap stays steady all year. That makes this pair predictable for recurring meetings, broadcast schedules, and contracts that care about a stable offset.
MST and JST sit exactly 16h apart, which leaves no shared 9-to-5 block. Live meetings have to bend one side's day, so most teams settle for one of two narrow windows: very early on the late side, or very late on the early side. That makes async messages, recorded standups, and clear handoff notes more valuable than calendar invites.
Reference zone, current offsets, country and city anchors, overlap math, and date-shift answers for MST to JST.
Reference pair
America/Phoenix -> Asia/Tokyo
Live offsets
MST -07:00 vs JST +09:00
Meaning split
Mountain Time / Japan Time
Country anchors
United States, Mexico, and Canada -> Japan
City anchors
Phoenix, Ciudad Juárez, Calgary, Edmonton -> Tokyo, Yokohama, Osaka, Nagoya
Workday overlap
No strict 9-to-5 overlap in the current offset state
Morning answer
9 AM MST = 1:00 AM JST, next day
Evening answer
6 PM MST = 10:00 AM JST, next 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.
MST to JST is pinned to America/Phoenix -> Asia/Tokyo, with the shorthand labels shown as context. The city anchors are Phoenix, Ciudad Juárez, Calgary, Edmonton on the MST side and Tokyo, Yokohama, Osaka, Nagoya on the JST side, with +16h between the live reference zones.
The 12 popular-hour answers include 0 same-day conversions, 12 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 GMT-7 (From side), PDT (From side), PST (From side), YT (From side), GMT+9 (To side), KST (To side). They may match mathematically, but their country calendars, city anchors, and common search intent differ from this exact pair.
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 | JST: Japan (JP); 1296 mapped cities; capital Tokyo; Japanese; JPY Japanese yen
Offset behavior, DST gap changes, local calendar evidence, and the day-shift pattern across the most common conversion hours.
MST/JST is a long-haul handoff gap: America/Phoenix currently reads -07:00, Asia/Tokyo reads +09:00, and the live delta is +16h. This class decides whether the page behaves like a same-day planner or a handoff planner.
America/Phoenix and Asia/Tokyo do not show a detected near-term DST gap-change note in this sample, but the page still exposes exact IANA zones so users do not treat the abbreviation pair as permanently fixed.
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 0 same-day answers, 12 next-day answers, 0 previous-day answers. That mix is specific to the current America/Phoenix -> Asia/Tokyo 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/Phoenix -> Asia/Tokyo, country anchors, city anchors, calendar notes, and day-shift examples.
MST and JST are not currently a same-offset pair; the live delta is +16h. Same-offset neighbors are still listed because users often confuse nearby abbreviations.
GMT-7 (From side, -07:00), PDT (From side, -07:00), PST (From side, -07:00), YT (From side, -07:00), GMT+9 (To side, +09:00), KST (To side, +09:00) The page keeps these labels visible so SGT/HKT/GST-style clusters do not blur into one generic offset page.
MST/JST uses 0 same-day answers, 12 next-day answers, 0 previous-day answers; 0h strict workday overlap; source zones America/Phoenix and Asia/Tokyo; country anchors United States, Mexico, and Canada -> Japan.
Common places, calendars, markets, languages, and operating contexts behindMST and JST.
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.
JST
JST is Japan civil time, centered on Tokyo, Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, and the rest of the Japanese domestic timetable. The useful context is Japan's no-DST posture, yen-denominated business cycles, Tokyo Stock Exchange timing, rail and aviation punctuality, anime/game/media release schedules, and holiday clusters such as Golden Week and year-end closures.
JST
A JST conversion is often searched by teams coordinating with Japan specifically, not merely UTC+9. Product launches, live streams, travel arrivals, and support handoffs should account for Japanese business etiquette, local public holidays, and the difference between Japan's stable clock and regions where daylight saving changes the counterpart offset.
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.
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)
MST
1 mapped city anchors; zones America/Ciudad_Juarez.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
34 mapped city anchors; zones America/Edmonton.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)
JST
1,296 mapped city anchors; zones Asia/Tokyo.capital Tokyo; Japanese; JPY Japanese yen
Holiday snapshot: New Year's Day (Jan 1, Public) · Coming of Age Day (Jan 12, Public) · Foundation Day (Feb 11, Public) · The Emperor's Birthday (Feb 23, Public) · Vernal Equinox Day (Mar 20, 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.
MST and MDT 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 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 PDT 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 PST 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 AKDT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
JST and GMT+9 match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
JST and KST match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
JST and PWT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
JST and WIT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
JST and YAKT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
JST and ACDT 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 theMST to JST page grounded in those concrete places.
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.
JST: Japan (JP); 1296 mapped cities; zones Asia/Tokyo; city anchors Tokyo (Asia/Tokyo, pop 9,733,276), Yokohama (Asia/Tokyo, pop 3,777,491), Osaka (Asia/Tokyo, pop 2,753,862), Nagoya (Asia/Tokyo, pop 2,332,176); official Japan; capital Tokyo; region Asia; subregion Eastern Asia; population 123,210,000; area 377,930 km2; languages Japanese; currency JPY Japanese yen.
Same-offset converter pages can look deceptively alike. These records pin the page to the exact abbreviations, IANA zones, countries, and city anchors behind MST and JST.
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.
JST (jst) is not marked ambiguous in the abbreviation catalog. Meaning records: Japan Time at UTC+09:00; listed zones Asia/Tokyo; source label Japan Time - Tokyo, Yokohama, Osaka, Nagoya.
JST currently maps to 1 country footprint in the converter dataset: Japan (JP). The footprint spans 1 IANA zone across 10 city anchors.
JST city anchors in this indexed page family: Tokyo [tokyo-JP, JP, Asia/Tokyo, pop 9,733,276]; Yokohama [yokohama-JP, JP, Asia/Tokyo, pop 3,777,491]; Osaka [osaka-JP, JP, Asia/Tokyo, pop 2,753,862]; Nagoya [nagoya-JP, JP, Asia/Tokyo, pop 2,332,176]; Sapporo [sapporo-JP, JP, Asia/Tokyo, pop 1,973,832]; Fukuoka [fukuoka-JP, JP, Asia/Tokyo, pop 1,612,392]; Kawasaki [kawasaki-JP, JP, Asia/Tokyo, pop 1,538,262]; Kobe [kobe-JP, JP, Asia/Tokyo, pop 1,525,152]; Kyoto [kyoto-JP, JP, Asia/Tokyo, pop 1,463,723]; Saitama [saitama-JP, JP, Asia/Tokyo, pop 1,324,854].
JST: Japan (JP); 1296 mapped cities; zones Asia/Tokyo; city anchors Tokyo (Asia/Tokyo, pop 9,733,276), Yokohama (Asia/Tokyo, pop 3,777,491), Osaka (Asia/Tokyo, pop 2,753,862), Nagoya (Asia/Tokyo, pop 2,332,176); official Japan; capital Tokyo; region Asia; subregion Eastern Asia; population 123,210,000; area 377,930 km2; languages Japanese; currency JPY Japanese yen.
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 (-06:00, Shares the mountain time family); GMT-7 (-07:00, Currently sits on the same UTC offset); PDT (-07:00, Currently sits on the same UTC offset); PST (-07:00, Currently sits on the same UTC offset); YT (-07:00, Currently sits on the same UTC offset); AKDT (-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.
JST is an Asian civil-time label, currently 9h ahead of UTC at +09:00. The lead reference is Tokyo, and the wider grouping reaches 1 country through 1 IANA zone. The busiest cities using JST in the current catalog are Tokyo, Yokohama, Osaka, Nagoya, and Sapporo. The lead live reference on this page is Tokyo (Asia/Tokyo), currently at +09:00 (GMT+9). Those cities are what give JST its actual feel rather than the abstract offset. JST is stable on Asia/Tokyo 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.
JST resolves cleanly here, but Asian labels often share letters with American or European ones — IST is shared between India and Israel, for instance. Pinning Asia/Tokyo avoids that whole class of confusion. Asia/Tokyo does not show an offset change in the next year, which makes JST 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 JST is the exact IANA zone used by your city or system. Asia/Tokyo sits at +09:00, ahead of UTC, which means daily logs in this zone reach a new calendar date before UTC does — a small detail that breaks date-based reporting if missed.
JST should not be blindly swapped with nearby labels. Adjacent references in the catalog: GMT+9 (+09:00, Currently sits on the same UTC offset); KST (+09:00, Currently sits on the same UTC offset); PWT (+09:00, Currently sits on the same UTC offset); WIT (+09:00, Currently sits on the same UTC offset); YAKT (+09:00, Currently sits on the same UTC offset); ACDT (+09:30, Runs on a nearby UTC offset).
JST has 1 meaning record, offset range UTC+09:00, labels Japan Time, and 1 country footprint across 1 IANA zone.
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.
JST country anchor Japan: Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asian mainland, it is bordered to the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands alongside 14,121 smaller islands. Japan is divided into 47 administrative prefectures and eight traditional regions, and around 75% of its terrain is mountainous and heavily forested, concentrating its agriculture and highly urbanized population along its eastern coastal plains. With a population of almost 123 million as of 2026, it is the world's 11th most populous country. Tokyo is the country's capital and largest city. 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.
JST is Japan civil time, centered on Tokyo, Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, and the rest of the Japanese domestic timetable. The useful context is Japan's no-DST posture, yen-denominated business cycles, Tokyo Stock Exchange timing, rail and aviation punctuality, anime/game/media release schedules, and holiday clusters such as Golden Week and year-end closures.
A JST conversion is often searched by teams coordinating with Japan specifically, not merely UTC+9. Product launches, live streams, travel arrivals, and support handoffs should account for Japanese business etiquette, local public holidays, and the difference between Japan's stable clock and regions where daylight saving changes the counterpart offset.
MST/JST uses America/Phoenix -> Asia/Tokyo, offset delta +16h, overlap 0h, route /convert/mst/jst/, and live abbreviation readings MST/GMT+9.
Reference fields include this converter pair's abbreviation records, representative IANA zones, current offsets, city anchors, country profiles, overlap math, conversion examples, and dossier notes.
MST coverage on this page is led by Phoenix, United States, Ciudad Juárez, Mexico, Calgary, Canada, and Edmonton, Canada, with 2 more in the live dataset. That mix is what makes MST feel anchored to West Coast and Pacific-edge American activity in practice rather than just an abbreviation on a chart.
JST coverage is led by Tokyo, Japan, Yokohama, Japan, Osaka, Japan, and Nagoya, Japan, with 2 more anchoring the wider label family. Combined with the MST side, this conversion ends up describing trans-Pacific outsourcing handoffs, gaming and entertainment release windows, and follow-the-sun engineering rotations.
Adjust the time. Digits roll like an odometer, and the swap button flips the zones.
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| MST | JST | Day relation |
|---|---|---|
| 9:00 AM | 1:00 AMMon, Jun 1 | next day |
| 12:00 PM | 4:00 AMMon, Jun 1 | next day |
| 3:00 PM | 7:00 AMMon, Jun 1 | next day |
| 6:00 PM | 10:00 AMMon, Jun 1 | next day |
| 9:00 PM | 1:00 PMMon, Jun 1 | next day |
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| JST | MST | Day relation |
|---|---|---|
| 9:00 AM | 5:00 PMSat, May 30 | previous day |
| 12:00 PM | 8:00 PMSat, May 30 | previous day |
| 3:00 PM | 11:00 PMSat, May 30 | previous day |
| 6:00 PM | 2:00 AMSun, May 31 | same day |
| 9:00 PM | 5:00 AMSun, May 31 | same day |
MST to JST ranges from MST 9:00 AM (which lands at JST 1:00 AM) through MST 9:00 PM (JST 1:00 PM). Most of those slots fall on a different calendar day on the JST side, which is why this direction always needs explicit dates in invites and ticket comments — the time alone is not enough.
JST to MST ranges from JST 9:00 AM (which lands at MST 5:00 PM) through JST 9:00 PM (MST 5:00 AM). Most of those slots fall on a different calendar day on the MST side, which is why this direction always needs explicit dates in invites and ticket comments — the time alone is not enough.
These direct answers are here for the exact-intent searches people actually use, like “10 AM MST to JST” or “4 PM MST in JST”.
8 AM MST = 12:00 AM JST (00:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
9 AM MST = 1:00 AM JST (01:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
10 AM MST = 2:00 AM JST (02:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
11 AM MST = 3:00 AM JST (03:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
12 PM MST = 4:00 AM JST (04:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
1 PM MST = 5:00 AM JST (05:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
2 PM MST = 6:00 AM JST (06:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
3 PM MST = 7:00 AM JST (07:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
4 PM MST = 8:00 AM JST (08:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
5 PM MST = 9:00 AM JST (09:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
6 PM MST = 10:00 AM JST (10:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
9 PM MST = 1:00 PM JST (13:00). On today's live calendar that lands on Mon, Jun 1 in JST, which means the answer is a next day conversion rather than a static offset lookup.
The live gap is +16h right now, based on America/Phoenix at -07:00 and Asia/Tokyo at +09:00. Neither reference zone shows an offset change in the next year, so the gap should stay stable.
There is no strict 9 AM to 5 PM overlap right now, so this pair is better for handoffs, travel planning, or async coordination than for midday meetings.
America/Phoenix
MST · -07:00
Asia/Tokyo
GMT+9 · +09:00
These are the busiest live references selected from the abbreviation families on this page.
| MST | JST |
|---|---|
| 17:00 | 09:00 |
| 18:00 | 10:00 |
| 19:00 | 11:00 |
| 20:00 | 12:00 |
| 21:00 | 13:00 |
| 22:00 | 14:00 |
| 23:00 | 15:00 |
| 00:00 | 16:00 |
| 01:00 | 17:00 |
| 02:00 | 18:00 |
| 03:00 | 19:00 |
| 04:00 | 20:00 |
| 05:00 | 21:00 |
| 06:00 | 22:00 |
| 07:00 | 23:00 |
| 08:00 | 00:00 |
| 09:00 | 01:00 |
| 10:00 | 02:00 |
| 11:00 | 03:00 |
| 12:00 | 04:00 |
| 13:00 | 05:00 |
| 14:00 | 06:00 |
| 15:00 | 07:00 |
| 16:00 | 08:00 |
Countries represented here include United States, Mexico, and Canada.
Countries represented here include Japan.
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