JST to IST to UTC to CST Time Converter
Quick answers
JST to IST
JST is 3 hours and 30 minutes ahead of IST year-round.
Working hours of 9:00 am to 5:00 pm in JST correspond to 5:30 am to 1:30 pm in IST.
JST to UTC
JST is 9 hours ahead of UTC year-round.
Working hours of 9:00 am to 5:00 pm in JST correspond to 12:00 am to 8:00 am in UTC.
JST to CST
For most of the year, JST is 14 hours ahead of CDT. During seasonal clock changes, JST is 15 hours ahead of CST.
For most of the year, working hours of 9:00 am to 5:00 pm in JST correspond to 7:00 pm (previous day) to 3:00 am in CDT. During seasonal clock changes, working hours of 9:00 am to 5:00 pm in JST correspond to 6:00 pm (previous day) to 2:00 am in CST.
Compare JST time with IST, UTC, and CST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Japan Standard Time is 3 hours and 30 minutes ahead of India Standard Time and 9 hours ahead of Universal Time Coordinated and 15 hours ahead of Central Standard Time
9:00 pm21:00 in JST is 5:30 pm17:30 in IST and is 12:00 pm12:00 in UTC and is 6:00 am06:00 in CST
JST to IST call time
Best time for a conference call or a meeting is between 12:30pm-5pm in JST which corresponds to 9am-1:30pm in IST
JST to UTC call time
Best time for a conference call or a meeting is between 5pm-6pm in JST which corresponds to 8am-9am in UTC
JST to CST call time
Best time for a conference call or a meeting is between 8am-9am in JST which corresponds to 5pm-6pm in CST (previous day)
9:00 pm21:00 Japan Standard Time (JST). Offset UTC +9:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
12:00 pm12:00 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
6:00 am06:00 Central Standard Time (CST). Offset UTC -6:00 hours
9:00 pm21:00 JST / 5:30 pm17:30 IST / 12:00 pm12:00 UTC / 6:00 am06:00 CST
| JST | IST | UTC | CST |
|---|---|---|---|
| 12am (midnight) | 8:30 pm | 3pm | 9am |
| 1am | 9:30 pm | 4pm | 10am |
| 2am | 10:30 pm | 5pm | 11am |
| 3am | 11:30 pm | 6pm | 12pm (noon) |
| 4am | 12:30 am | 7pm | 1pm |
| 5am | 1:30 am | 8pm | 2pm |
| 6am | 2:30 am | 9pm | 3pm |
| 7am | 3:30 am | 10pm | 4pm |
| 8am | 4:30 am | 11pm | 5pm |
| 9am | 5:30 am | 12am (midnight) | 6pm |
| 10am | 6:30 am | 1am | 7pm |
| 11am | 7:30 am | 2am | 8pm |
| 12pm (noon) | 8:30 am | 3am | 9pm |
| 1pm | 9:30 am | 4am | 10pm |
| 2pm | 10:30 am | 5am | 11pm |
| 3pm | 11:30 am | 6am | 12am (midnight) |
| 4pm | 12:30 pm | 7am | 1am |
| 5pm | 1:30 pm | 8am | 2am |
| 6pm | 2:30 pm | 9am | 3am |
| 7pm | 3:30 pm | 10am | 4am |
| 8pm | 4:30 pm | 11am | 5am |
| 9pm | 5:30 pm | 12pm (noon) | 6am |
| 10pm | 6:30 pm | 1pm | 7am |
| 11pm | 7:30 pm | 2pm | 8am |
| 00:00 | 20:30 | 15:00 | 09:00 |
| 01:00 | 21:30 | 16:00 | 10:00 |
| 02:00 | 22:30 | 17:00 | 11:00 |
| 03:00 | 23:30 | 18:00 | 12:00 |
| 04:00 | 00:30 | 19:00 | 13:00 |
| 05:00 | 01:30 | 20:00 | 14:00 |
| 06:00 | 02:30 | 21:00 | 15:00 |
| 07:00 | 03:30 | 22:00 | 16:00 |
| 08:00 | 04:30 | 23:00 | 17:00 |
| 09:00 | 05:30 | 00:00 | 18:00 |
| 10:00 | 06:30 | 01:00 | 19:00 |
| 11:00 | 07:30 | 02:00 | 20:00 |
| 12:00 | 08:30 | 03:00 | 21:00 |
| 13:00 | 09:30 | 04:00 | 22:00 |
| 14:00 | 10:30 | 05:00 | 23:00 |
| 15:00 | 11:30 | 06:00 | 00:00 |
| 16:00 | 12:30 | 07:00 | 01:00 |
| 17:00 | 13:30 | 08:00 | 02:00 |
| 18:00 | 14:30 | 09:00 | 03:00 |
| 19:00 | 15:30 | 10:00 | 04:00 |
| 20:00 | 16:30 | 11:00 | 05:00 |
| 21:00 | 17:30 | 12:00 | 06:00 |
| 22:00 | 18:30 | 13:00 | 07:00 |
| 23:00 | 19:30 | 14:00 | 08:00 |
Japan Standard Time
Offset: JST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: Japan
Principal Cities: The largest city in the JST time zone is Tokyo in Japan, with about 8.337 million people. Other major cities in this time zone include Yokohama, Osaka shi, Nagoya shi, Sapporo.
Daylight Saving: Clocks in Japan Standard Time (JST) do not change for daylight saving time, so JST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
JST representations, usage and related time zones
- +09 - basic short
- +0900 - basic
- +09:00 - extended
- +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
- India - Military abbreviation for JST
- I - short form of 'India'
- Asia/Tokyo
- Japan
- AWDT - Australian Western Daylight Time
- CHOST - Choibalsan Summer Time
- I - India Time Zone
- IRKST - Irkutsk Summer Time
- JST - Japan Standard Time
- KST - Korea Standard Time
- PWT - Palau Time
- TLT - East Timor Time
- ULAST - Ulaanbaatar Summer Time
- WIT - Eastern Indonesian Time
- YAKT - Yakutsk Time
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bangalore, Kolkata, Chennai.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
Universal Time Coordinated
Offset: UTC is 0 hours ahead Greenwich Mean Time (GMT) and is used in Universal
Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.
UTC representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for UTC
- Z - short form of 'Zulu'
- Etc/UCT
- Etc/UTC
- Etc/Universal
- Etc/Zulu
- UCT
- UTC
- Universal
- Zulu
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Central Standard Time
Offset: CST is 6 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries using this time zone: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States
Principal Cities: The largest city in the CST time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Iztapalapa, Ecatepec.
French: HNC - Heure Normale du Centre
Spanish: CT - Tiempo Central Estándar, CT - Zona Centro
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central Daylight Time (CDT).
Start: Central Standard Time (CST) started on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually on the first Sunday of November.
End: Central Standard Time (CST) ends on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am local daylight time instead. Standard time ends annually on the second Sunday of March.
CST representations, usage and related time zones
- -06 - basic short
- -0600 - basic
- -06:00 - extended
- -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
- Sierra - Military abbreviation for CST
- S - short form of 'Sierra'
- America/Bahia_Banderas
- America/Belize
- America/Chicago
- America/Chihuahua
- America/Costa_Rica
- America/El_Salvador
- America/Guatemala
- America/Indiana/Knox
- America/Indiana/Tell_City
- America/Knox_IN
- America/Managua
- America/Matamoros
- America/Menominee
- America/Merida
- America/Mexico_City
- America/Monterrey
- America/North_Dakota/Beulah
- America/North_Dakota/Center
- America/North_Dakota/New_Salem
- America/Ojinaga
- America/Rainy_River
- America/Rankin_Inlet
- America/Regina
- America/Resolute
- America/Swift_Current
- America/Tegucigalpa
- America/Winnipeg
- CST6CDT
- Canada/Central
- Canada/Saskatchewan
- Mexico/General
- US/Central
- US/Indiana-Starke
- Central Standard Time - UTC -6
- China Standard Time - UTC +8
- Cuba Standard Time - UTC -5
- CST - Central Standard Time
- CT - Central Time
- MDT - Mountain Daylight Time
- EAST - Easter Island Standard Time
- GALT - Galapagos Time
- S - Sierra Time Zone