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Timezone converter
CST to JST currently uses China Time in Asia/Shanghai and Japan Time in Asia/Tokyo as the live reference pair, with a +1h live gap. CST (US) and JST is a long Pacific-spanning pair used in automotive, gaming, and consumer-electronics supply chains where decisions in Chicago need to reach Tokyo before the next manufacturing day starts.
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.
CST is ambiguous in this dataset, so the live converter uses Asia/Shanghai as the busiest reference zone while the city list below shows the wider label family.
From
China Time
Asia/Shanghai · GMT+8 +08:00
Major markets in this grouping include Shanghai, Beijing, Shenzhen, Guangzhou.
To
Japan Time
Asia/Tokyo · GMT+9 +09:00
Major markets in this grouping include Tokyo, Yokohama, Osaka, Nagoya.
Current gap
+1h
CST +08:00 vs JST +09:00
9-to-5 overlap
7h
CST 9:00 AM previous day to 4:00 PM previous day
Representative countries
China, Mexico, and United States / Japan
Based on the busiest city and zone usage found in the current dataset.
CST (Shanghai, +08:00) to JST (Tokyo, +09:00) is currently a +1h conversion. Live coverage on the CST side is anchored by Shanghai, Beijing, Shenzhen, and Guangzhou; the JST side draws from Tokyo, Yokohama, Osaka, and Nagoya.
CST (US) and JST is a long Pacific-spanning pair used in automotive, gaming, and consumer-electronics supply chains where decisions in Chicago need to reach Tokyo before the next manufacturing day starts.
CST means an overloaded label spanning North American Central Time, Cuba Time, and China-related meanings in the catalog; watch US and Canadian DST windows, Mexico and Central America holidays, and Cuba public holidays. JST is grounded here by Japan. The curated side is where most same-offset duplication risk is removed, because it names the civil calendar and operating context users actually mean.
Both reference zones sit inside Asia, so this is a regional comparison rather than a long-haul conversion. The gap of +1h mostly affects intra-continental travel, regional logistics, and Asia-wide calendars.
Neither CST 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.
CST and JST sit exactly 1h apart, leaving a generous 7h 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 CST to JST.
Reference pair
Asia/Shanghai -> Asia/Tokyo
Live offsets
CST +08:00 vs JST +09:00
Meaning split
China Time / Japan Time
Country anchors
China, Mexico, and United States -> Japan
City anchors
Shanghai, Beijing, Shenzhen, Guangzhou -> Tokyo, Yokohama, Osaka, Nagoya
Workday overlap
7h window: CST 9:00 AM previous day-4:00 PM previous day
Morning answer
9 AM CST = 10:00 AM JST, same day
Evening answer
6 PM CST = 7:00 PM JST, 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.
CST to JST is pinned to Asia/Shanghai -> Asia/Tokyo, with the shorthand labels shown as context. The city anchors are Shanghai, Beijing, Shenzhen, Guangzhou on the CST side and Tokyo, Yokohama, Osaka, Nagoya on the JST side, with +1h 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 WITA (From side), GMT+9 (To side), KST (To side), PWT (To side), WIT (To side), YAKT (To side). They may match mathematically, but their country calendars, city anchors, and common search intent differ from this exact pair.
CST: China (CN); 2078 mapped cities; capital Beijing; Chinese; CNY Chinese yuan | CST: Mexico (MX); 470 mapped cities; capital Mexico City; Spanish; MXN Mexican peso | CST: United States (US); 899 mapped cities; capital Washington, D.C.; English; USD United States dollar | CST: Cuba (CU); 140 mapped cities; capital Havana; Spanish; CUC Cuban convertible peso, CUP Cuban peso | CST: Guatemala (GT); 102 mapped cities; capital Guatemala City; Spanish; GTQ Guatemalan quetzal | 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.
CST/JST is a short-haul offset gap: Asia/Shanghai currently reads +08:00, Asia/Tokyo reads +09:00, and the live delta is +1h. This class decides whether the page behaves like a same-day planner or a handoff planner.
Asia/Shanghai 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 12 same-day answers, 0 next-day answers, 0 previous-day answers. That mix is specific to the current Asia/Shanghai -> 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: Asia/Shanghai -> Asia/Tokyo, country anchors, city anchors, calendar notes, and day-shift examples.
CST and JST are not currently a same-offset pair; the live delta is +1h. Same-offset neighbors are still listed because users often confuse nearby abbreviations.
WITA (From side, +08:00), GMT+9 (To side, +09:00), KST (To side, +09:00), PWT (To side, +09:00), WIT (To side, +09:00), YAKT (To side, +09:00) The page keeps these labels visible so SGT/HKT/GST-style clusters do not blur into one generic offset page.
CST/JST uses 12 same-day answers, 0 next-day answers, 0 previous-day answers; 7h strict workday overlap; source zones Asia/Shanghai and Asia/Tokyo; country anchors China, Mexico, and United States -> Japan.
Common places, calendars, markets, languages, and operating contexts behindCST and JST.
CST
CST is one of the most overloaded timezone abbreviations on the site. It can mean North American Central Time, Cuba Time, China-related civil time, or other catalog meanings depending on the source. A CST converter page must be read through the representative IANA zone and the listed city anchors, not through the letters alone.
CST
For international users, CST is a trap label: Chicago, Mexico City, Havana, Macau, Shanghai, and Urumqi are not interchangeable scheduling contexts. The same three letters can imply different countries, DST rules, holidays, languages, and date-shift behavior.
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.
CST
2,078 mapped city anchors; zones Asia/Shanghai, Asia/Urumqi.capital Beijing; Chinese; CNY Chinese yuan
Holiday snapshot: New Year's Day (Jan 1, Public) · Chinese New Year (Spring Festival) (Feb 17, Public) · Labour Day (May 1, Public) · Dragon Boat Festival (Jun 19, Public) · Mid-Autumn Festival (Sep 25, Public)
CST
470 mapped city anchors; zones America/Mexico_City, America/Matamoros.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)
CST
899 mapped city anchors; zones America/Chicago.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)
CST
140 mapped city anchors; zones America/Havana.capital Havana; Spanish; CUC Cuban convertible peso, CUP Cuban peso
Holiday snapshot: Triumph of the Revolution (Jan 1, Public) · Victory of Fidel Castro (Jan 2, Public) · Good Friday (Apr 3, Public) · Labour Day (May 1, Public) · Day before the Commemoration of the Assault of the Moncada garrison (Jul 25, Public)
CST
102 mapped city anchors; zones America/Guatemala.capital Guatemala City; Spanish; GTQ Guatemalan quetzal
Holiday snapshot: New Year's Day (Jan 1, Public) · Maundy Thursday (Apr 2, Public) · Good Friday (Apr 3, Public) · Holy Saturday (Apr 4, Public) · Easter Sunday (Apr 5, 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.
CST and WITA match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
CST and ACWST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
CST 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.
CST and ACST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
CST and CAT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
CST 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.
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 theCST to JST page grounded in those concrete places.
CST: China (CN); 2078 mapped cities; zones Asia/Shanghai, Asia/Urumqi; city anchors Shanghai (Asia/Shanghai, pop 24,874,500), Beijing (Asia/Shanghai, pop 18,960,744), Shenzhen (Asia/Shanghai, pop 17,494,398), Guangzhou (Asia/Shanghai, pop 16,096,724); official People's Republic of China; capital Beijing; region Asia; subregion Eastern Asia; population 1,408,280,000; area 9,706,961 km2; languages Chinese; currency CNY Chinese yuan.
CST: Mexico (MX); 470 mapped cities; zones America/Mexico City, America/Matamoros; city anchors Mexico City (America/Mexico_City, pop 12,294,193), Iztapalapa (America/Mexico_City, pop 1,835,486), Puebla (America/Mexico_City, pop 1,692,181), Ecatepec de Morelos (America/Mexico_City, pop 1,645,352); 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.
CST: United States (US); 899 mapped cities; zones America/Chicago; city anchors Chicago (America/Chicago, pop 2,664,452), Houston (America/Chicago, pop 2,314,157), San Antonio (America/Chicago, pop 1,526,656), Dallas (America/Chicago, pop 1,326,087); 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.
CST: Cuba (CU); 140 mapped cities; zones America/Havana; city anchors Havana (America/Havana, pop 2,163,824), Santiago de Cuba (America/Havana, pop 555,865), Camagüey (America/Havana, pop 347,562), Holguín (America/Havana, pop 319,102); official Republic of Cuba; capital Havana; region Americas; subregion Caribbean; population 9,748,007; area 109,884 km2; languages Spanish; currency CUC Cuban convertible peso, CUP Cuban peso.
CST: Guatemala (GT); 102 mapped cities; zones America/Guatemala; city anchors Guatemala City (America/Guatemala, pop 994,938), Villa Nueva (America/Guatemala, pop 618,397), Mixco (America/Guatemala, pop 465,773), Cobán (America/Guatemala, pop 212,047); official Republic of Guatemala; capital Guatemala City; region Americas; subregion Central America; population 18,079,810; area 108,889 km2; languages Spanish; currency GTQ Guatemalan quetzal.
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 CST and JST.
CST (cst) is ambiguous in the abbreviation catalog. Meaning records: Central Time at UTC-06:00; listed zones America/Belize; America/Guatemala; America/Managua; America/Mexico City; America/Costa Rica; America/El Salvador; America/Regina; America/Tegucigalpa; America/Chicago; America/Matamoros; America/Winnipeg; source label Central Time - Belize City, San Pedro, Orange Walk, Belmopan | Cuba Time at UTC-05:00; listed zones America/Havana; source label Cuba Time - Havana, Santiago de Cuba, Camagüey, Holguín | China Time at UTC+06:00; listed zones Asia/Urumqi; source label China Time - Ürümqi, Shihezi, Korla, Aqsu | China Time at UTC+08:00; listed zones Asia/Macau; Asia/Shanghai; source label China Time - Macau, Taipa, Sé, Luhuan.
CST currently maps to 8 country footprints in the converter dataset: China (CN), Mexico (MX), United States (US), Cuba (CU), Guatemala (GT), Nicaragua (NI), Honduras (HN), Canada (CA). The footprint spans 11 IANA zones across 10 city anchors.
CST city anchors in this indexed page family: Shanghai [shanghai-CN, CN, Asia/Shanghai, pop 24,874,500]; Beijing [beijing-CN, CN, Asia/Shanghai, pop 18,960,744]; Shenzhen [shenzhen-CN, CN, Asia/Shanghai, pop 17,494,398]; Guangzhou [guangzhou-CN, CN, Asia/Shanghai, pop 16,096,724]; Chengdu [chengdu-CN, CN, Asia/Shanghai, pop 13,568,357]; Mexico City [mexico-city-MX, MX, America/Mexico_City, pop 12,294,193]; Tianjin [tianjin-CN, CN, Asia/Shanghai, pop 11,090,314]; Wuhan [wuhan-CN, CN, Asia/Shanghai, pop 10,392,693]; Dongguan [dongguan-CN, CN, Asia/Shanghai, pop 9,644,871]; Xi’an [xi-an-CN, CN, Asia/Shanghai, pop 9,600,000].
CST: China (CN); 2078 mapped cities; zones Asia/Shanghai, Asia/Urumqi; city anchors Shanghai (Asia/Shanghai, pop 24,874,500), Beijing (Asia/Shanghai, pop 18,960,744), Shenzhen (Asia/Shanghai, pop 17,494,398), Guangzhou (Asia/Shanghai, pop 16,096,724); official People's Republic of China; capital Beijing; region Asia; subregion Eastern Asia; population 1,408,280,000; area 9,706,961 km2; languages Chinese; currency CNY Chinese yuan. CST: Mexico (MX); 470 mapped cities; zones America/Mexico City, America/Matamoros; city anchors Mexico City (America/Mexico_City, pop 12,294,193), Iztapalapa (America/Mexico_City, pop 1,835,486), Puebla (America/Mexico_City, pop 1,692,181), Ecatepec de Morelos (America/Mexico_City, pop 1,645,352); 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. CST: United States (US); 899 mapped cities; zones America/Chicago; city anchors Chicago (America/Chicago, pop 2,664,452), Houston (America/Chicago, pop 2,314,157), San Antonio (America/Chicago, pop 1,526,656), Dallas (America/Chicago, pop 1,326,087); 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. CST: Cuba (CU); 140 mapped cities; zones America/Havana; city anchors Havana (America/Havana, pop 2,163,824), Santiago de Cuba (America/Havana, pop 555,865), Camagüey (America/Havana, pop 347,562), Holguín (America/Havana, pop 319,102); official Republic of Cuba; capital Havana; region Americas; subregion Caribbean; population 9,748,007; area 109,884 km2; languages Spanish; currency CUC Cuban convertible peso, CUP Cuban peso. CST: Guatemala (GT); 102 mapped cities; zones America/Guatemala; city anchors Guatemala City (America/Guatemala, pop 994,938), Villa Nueva (America/Guatemala, pop 618,397), Mixco (America/Guatemala, pop 465,773), Cobán (America/Guatemala, pop 212,047); official Republic of Guatemala; capital Guatemala City; region Americas; subregion Central America; population 18,079,810; area 108,889 km2; languages Spanish; currency GTQ Guatemalan quetzal.
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.
CST is reused across 4 different meanings in this dataset — China Time, Central Time, and Cuba Time — which is why the short code alone is not enough to identify a place. Each meaning maps to its own IANA zone family and its own DST behavior, and they happen to share the same letters by historical accident more than by design. The busiest cities using CST in the current catalog are Shanghai, Beijing, Shenzhen, Guangzhou, and Chengdu. The lead live reference on this page is Shanghai (Asia/Shanghai), currently at +08:00 (GMT+8). Those cities are what give CST its actual feel rather than the abstract offset. CST has a local identity beyond its offset: an overloaded label spanning North American Central Time, Cuba Time, and China-related meanings in the catalog. Calendar signals such as US and Canadian DST windows, Mexico and Central America holidays, Cuba public holidays, and China-related civil-calendar context and operational signals such as Chicago, Dallas, Mexico City, Havana, Macau, Shanghai, and Urumqi schedule disambiguation are why this abbreviation should not be flattened into a same-offset neighbor. Because CST spans UTC-06:00 to UTC+08:00 across the active meanings, software, calendars, and contracts should always pin a specific IANA zone such as Asia/Shanghai or a literal UTC offset. The short label is fine for headlines and chat; it is the wrong primitive for storing or scheduling timestamps.
CST appears with 4 distinct meanings in current data, splitting across UTC-06:00 to UTC+08:00. The short label looks tidy in writing but quietly hides which place you mean — pick a city, a country, or an IANA zone before it matters. CST is never safe without a place name: the legal-time rule changes when the source is America/Chicago, America/Havana, Asia/Shanghai, or another listed zone. Not the same as ICT or WIB: CST is usually the source ambiguity, while ICT and WIB are target-region labels with different country calendars. Asia/Shanghai does not show an offset change in the next year, which makes CST 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 CST is the exact IANA zone used by your city or system. Asia/Shanghai sits at +08:00, 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.
CST should not be blindly swapped with nearby labels. Adjacent references in the catalog: WITA (+08:00, Shares the central time family); ACWST (+08:45, Shares the central time family); ACDT (+09:30, Shares the central time family); ACST (+09:30, Shares the central time family); CAT (+02:00, Shares the central time family); CDT (-05:00, Shares the central time family).
CST has 4 meaning records, offset range UTC-06:00 to UTC+08:00, labels China Time, Central Time, Cuba Time, and 12 country footprints across 15 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.
CST country anchor China: China, officially the People's Republic of China (PRC), is a country in East Asia. It is the second-most populous country after India, with a population exceeding 1.4 billion, representing 17% of the world's population. China borders fourteen countries by land across an area of 9.6 million square kilometers (3,700,000 sq mi), making it the third-largest country by area. The country is divided into 33 province-level divisions: 22 provinces, 5 autonomous regions, 4 municipalities, and 2 semi-autonomous special administrative regions. Beijing is the capital, while Shanghai is the most populous city by urban area and largest financial center. 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.
CST is one of the most overloaded timezone abbreviations on the site. It can mean North American Central Time, Cuba Time, China-related civil time, or other catalog meanings depending on the source. A CST converter page must be read through the representative IANA zone and the listed city anchors, not through the letters alone.
For international users, CST is a trap label: Chicago, Mexico City, Havana, Macau, Shanghai, and Urumqi are not interchangeable scheduling contexts. The same three letters can imply different countries, DST rules, holidays, languages, and date-shift behavior.
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.
CST/JST uses Asia/Shanghai -> Asia/Tokyo, offset delta +1h, overlap 7h, route /convert/cst/jst/, and live abbreviation readings GMT+8/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.
CST coverage on this page is led by Shanghai, China, Beijing, China, Shenzhen, China, and Guangzhou, China, with 2 more in the live dataset. That mix is what makes CST feel anchored to East Asian financial centers in practice rather than just an abbreviation on a chart. Local signals include Chicago, Dallas, Mexico City, Havana, Macau, Shanghai, and Urumqi schedule disambiguation.
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 CST side, this conversion ends up describing intra-Asia regional logistics and travel coordination.
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.
| CST | JST | Day relation |
|---|---|---|
| 9:00 AM | 10:00 AMMon, May 25 | same day |
| 12:00 PM | 1:00 PMMon, May 25 | same day |
| 3:00 PM | 4:00 PMMon, May 25 | same day |
| 6:00 PM | 7:00 PMMon, May 25 | same day |
| 9:00 PM | 10:00 PMMon, May 25 | same day |
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| JST | CST | Day relation |
|---|---|---|
| 9:00 AM | 8:00 AMMon, May 25 | same day |
| 12:00 PM | 11:00 AMMon, May 25 | same day |
| 3:00 PM | 2:00 PMMon, May 25 | same day |
| 6:00 PM | 5:00 PMMon, May 25 | same day |
| 9:00 PM | 8:00 PMMon, May 25 | same day |
CST to JST ranges from CST 9:00 AM (which lands at JST 10:00 AM) through CST 9:00 PM (JST 10:00 PM). CST and JST are close enough that this direction reads almost like a same-zone schedule — most CST invites land on a sensible JST hour without any extra effort.
JST to CST ranges from JST 9:00 AM (which lands at CST 8:00 AM) through JST 9:00 PM (CST 8:00 PM). JST and CST are close enough that this direction reads almost like a same-zone schedule — most JST invites land on a sensible CST hour without any extra effort.
These direct answers are here for the exact-intent searches people actually use, like “10 AM CST to JST” or “4 PM CST in JST”.
8 AM CST = 9:00 AM JST (09:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
9 AM CST = 10:00 AM JST (10:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
10 AM CST = 11:00 AM JST (11:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
11 AM CST = 12:00 PM JST (12:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
12 PM CST = 1:00 PM JST (13:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
1 PM CST = 2:00 PM JST (14:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
2 PM CST = 3:00 PM JST (15:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
3 PM CST = 4:00 PM JST (16:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
4 PM CST = 5:00 PM JST (17:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
5 PM CST = 6:00 PM JST (18:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
6 PM CST = 7:00 PM JST (19:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
9 PM CST = 10:00 PM JST (22:00). On today's live calendar that lands on Mon, May 25 in JST, which means the answer is a same day conversion rather than a static offset lookup.
The live gap is +1h right now, based on Asia/Shanghai at +08:00 and Asia/Tokyo at +09:00. Neither reference zone shows an offset change in the next year, so the gap should stay stable.
The most usable workday block right now is about 7 hours: CST 9:00 AM previous day to 4:00 PM previous day, which lines up with JST 10:00 AM previous day to 5:00 PM previous day.
Asia/Shanghai
GMT+8 · +08:00
Asia/Tokyo
GMT+9 · +09:00
These are the busiest live references selected from the abbreviation families on this page.
| CST | JST |
|---|---|
| 08:00 | 09:00 |
| 09:00 | 10:00 |
| 10:00 | 11:00 |
| 11:00 | 12:00 |
| 12:00 | 13:00 |
| 13:00 | 14:00 |
| 14:00 | 15:00 |
| 15:00 | 16:00 |
| 16:00 | 17:00 |
| 17:00 | 18:00 |
| 18:00 | 19:00 |
| 19:00 | 20:00 |
| 20:00 | 21:00 |
| 21:00 | 22:00 |
| 22:00 | 23:00 |
| 23:00 | 00:00 |
| 00:00 | 01:00 |
| 01:00 | 02:00 |
| 02:00 | 03:00 |
| 03:00 | 04:00 |
| 04:00 | 05:00 |
| 05:00 | 06:00 |
| 06:00 | 07:00 |
| 07:00 | 08:00 |
Countries represented here include China, Mexico, and United States.
Countries represented here include Japan.
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.
