UTC
Universal Time Coordinated
GMT +0
JST
Japan Standard Time
GMT +9
IST
India Standard Time
GMT +5:30

Time Difference

Universal Time Coordinated is 9 hours behind Japan Standard Time and 5 hours and 30 minutes behind India Standard Time
9:30 am09:30 in UTC is 6:30 pm18:30 in JST and is 3:00 pm15:00 in IST

UTC to JST call time
Best time for a conference call or a meeting is between 8am-10am in UTC which corresponds to 5pm-7pm in JST
UTC to IST call time
Best time for a conference call or a meeting is between 8am-12:30pm in UTC which corresponds to 1:30pm-6pm in IST

9:30 am09:30 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
6:30 pm18:30 Japan Standard Time (JST). Offset UTC +9:00 hours
3:00 pm15:00 India Standard Time (IST). Offset UTC +5:30 hours

9:30 am09:30 UTC / 6:30 pm18:30 JST / 3:00 pm15:00 IST

UTC JST IST
12am (midnight) 9am 5:30 am
1am 10am 6:30 am
2am 11am 7:30 am
3am 12pm (noon) 8:30 am
4am 1pm 9:30 am
5am 2pm 10:30 am
6am 3pm 11:30 am
7am 4pm 12:30 pm
8am 5pm 1:30 pm
9am 6pm 2:30 pm
10am 7pm 3:30 pm
11am 8pm 4:30 pm
12pm (noon) 9pm 5:30 pm
1pm 10pm 6:30 pm
2pm 11pm 7:30 pm
3pm 12am (midnight) 8:30 pm
4pm 1am 9:30 pm
5pm 2am 10:30 pm
6pm 3am 11:30 pm
7pm 4am 12:30 am
8pm 5am 1:30 am
9pm 6am 2:30 am
10pm 7am 3:30 am
11pm 8am 4:30 am
0:00 9:00 5:30
1:00 10:00 6:30
2:00 11:00 7:30
3:00 12:00 8:30
4:00 13:00 9:30
5:00 14:00 10:30
6:00 15:00 11:30
7:00 16:00 12:30
8:00 17:00 13:30
9:00 18:00 14:30
10:00 19:00 15:30
11:00 20:00 16:30
12:00 21:00 17:30
13:00 22:00 18:30
14:00 23:00 19:30
15:00 0:00 20:30
16:00 1:00 21:30
17:00 2:00 22:30
18:00 3:00 23:30
19:00 4:00 0:30
20:00 5:00 1:30
21:00 6:00 2:30
22:00 7:00 3:30
23:00 8:00 4:30

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

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates zero hour and zero minutes time differences of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for UTC
  • Z - short form of 'Zulu'
IANA/Olson: Reflects UTC time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Etc/UCT
  • Etc/UTC
  • Etc/Universal
  • Etc/Zulu
  • UCT
  • UTC
  • Universal
  • Zulu
Time zones with the GMT +0 offset:
  • 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

Japan Standard Time

Offset: JST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: Japan

Principal Cities: The largest city in the JST timezone is Tokyo from Japan with population about 8.337 million people. Other major cities in the area are Yokohama, Osaka shi, Nagoya shi, Sapporo

Daylight Saving: Japan Standard Time (JST) is not adjusted for daylight saving therefore JST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, Japan Standard Time remains the same

JST Time Zone Geo Map
JST timezone map

JST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates nine hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for JST
  • I - short form of 'India'
IANA/Olson: Reflects JST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Tokyo
  • Japan
Time zones with the GMT +9 offset:
  • 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: It is used in following countries: India

Principal Cities: The largest city in the IST timezone is Mumbai from India with population about 12.692 million people. Other major cities in the area are Delhi, Bangalore, Kolkata, Chennai

Daylight Saving: India Standard Time (IST) is not adjusted for daylight saving therefore IST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, India Standard Time remains the same

IST Time Zone Geo Map
IST timezone map

IST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0530 - basic
  • +05:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates five hour and thirty minutes time differences to the east of the zero meridian.
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Calcutta
  • Asia/Kolkata
IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones
  • India Standard Time - UTC +5:30
  • Irish Standard Time - UTC +1
  • Israel Standard Time - UTC +2
  • Irkutsk Standard Time - UTC +8