IST
India Standard Time
GMT +5:30
KST
Korea Standard Time
GMT +9
UTC
Universal Time Coordinated
GMT +0
WIB
Western Indonesian Time
GMT +7
Time Difference
India Standard Time is 3 hours and 30 minutes behind Korea Standard Time and 5 hours and 30 minutes ahead of Universal Time Coordinated and 1 hours and 30 minutes behind Western Indonesian Time
8:00 am08:00 in IST is 11:30 am11:30 in KST and is 2:30 am02:30 in UTC and is 9:30 am09:30 in WIB
IST to KST call time
Best time for a conference call or a meeting is between 8am-2:30pm in IST which corresponds to 11:30am-6pm in KST
IST to UTC call time
Best time for a conference call or a meeting is between 1:30pm-6pm in IST which corresponds to 8am-12:30pm in UTC
IST to WIB call time
Best time for a conference call or a meeting is between 8am-4:30pm in IST which corresponds to 9:30am-6pm in WIB
8:00 am08:00 India Standard Time (IST). Offset UTC +5:30 hours
11:30 am11:30 Korea Standard Time (KST). Offset UTC +9:00 hours
2:30 am02:30 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
9:30 am09:30 Western Indonesian Time (WIB). Offset UTC +7:00 hours
8:00 am08:00 IST / 11:30 am11:30 KST / 2:30 am02:30 UTC / 9:30 am09:30 WIB
| IST | KST | UTC | WIB |
|---|---|---|---|
| 12am (midnight) | 3:30 am | 6:30 pm | 1:30 am |
| 1am | 4:30 am | 7:30 pm | 2:30 am |
| 2am | 5:30 am | 8:30 pm | 3:30 am |
| 3am | 6:30 am | 9:30 pm | 4:30 am |
| 4am | 7:30 am | 10:30 pm | 5:30 am |
| 5am | 8:30 am | 11:30 pm | 6:30 am |
| 6am | 9:30 am | 12:30 am | 7:30 am |
| 7am | 10:30 am | 1:30 am | 8:30 am |
| 8am | 11:30 am | 2:30 am | 9:30 am |
| 9am | 12:30 pm | 3:30 am | 10:30 am |
| 10am | 1:30 pm | 4:30 am | 11:30 am |
| 11am | 2:30 pm | 5:30 am | 12:30 pm |
| 12pm (noon) | 3:30 pm | 6:30 am | 1:30 pm |
| 1pm | 4:30 pm | 7:30 am | 2:30 pm |
| 2pm | 5:30 pm | 8:30 am | 3:30 pm |
| 3pm | 6:30 pm | 9:30 am | 4:30 pm |
| 4pm | 7:30 pm | 10:30 am | 5:30 pm |
| 5pm | 8:30 pm | 11:30 am | 6:30 pm |
| 6pm | 9:30 pm | 12:30 pm | 7:30 pm |
| 7pm | 10:30 pm | 1:30 pm | 8:30 pm |
| 8pm | 11:30 pm | 2:30 pm | 9:30 pm |
| 9pm | 12:30 am | 3:30 pm | 10:30 pm |
| 10pm | 1:30 am | 4:30 pm | 11:30 pm |
| 11pm | 2:30 am | 5:30 pm | 12:30 am |
| 0:00 | 3:30 | 18:30 | 1:30 |
| 1:00 | 4:30 | 19:30 | 2:30 |
| 2:00 | 5:30 | 20:30 | 3:30 |
| 3:00 | 6:30 | 21:30 | 4:30 |
| 4:00 | 7:30 | 22:30 | 5:30 |
| 5:00 | 8:30 | 23:30 | 6:30 |
| 6:00 | 9:30 | 0:30 | 7:30 |
| 7:00 | 10:30 | 1:30 | 8:30 |
| 8:00 | 11:30 | 2:30 | 9:30 |
| 9:00 | 12:30 | 3:30 | 10:30 |
| 10:00 | 13:30 | 4:30 | 11:30 |
| 11:00 | 14:30 | 5:30 | 12:30 |
| 12:00 | 15:30 | 6:30 | 13:30 |
| 13:00 | 16:30 | 7:30 | 14:30 |
| 14:00 | 17:30 | 8:30 | 15:30 |
| 15:00 | 18:30 | 9:30 | 16:30 |
| 16:00 | 19:30 | 10:30 | 17:30 |
| 17:00 | 20:30 | 11:30 | 18:30 |
| 18:00 | 21:30 | 12:30 | 19:30 |
| 19:00 | 22:30 | 13:30 | 20:30 |
| 20:00 | 23:30 | 14:30 | 21:30 |
| 21:00 | 0:30 | 15:30 | 22:30 |
| 22:00 | 1:30 | 16:30 | 23:30 |
| 23:00 | 2:30 | 17:30 | 0:30 |
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 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
- Iran Standard Time - UTC +3:30
Korea Standard Time
Offset: KST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia
Countries: It is used in following countries: Korea (North), Korea (South)
Principal Cities: The largest city in the KST timezone is Seoul from South Korea with population about 10.349 million people. Other major cities in the area are Busan, Pyongyang, Incheon, Daegu
Daylight Saving: Korea Standard Time (KST) is not adjusted for daylight saving therefore KST 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, Korea Standard Time remains the same
KST 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 KST
- I - short form of 'India'
IANA/Olson: Reflects KST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- Asia/Pyongyang
- Asia/Seoul
- ROK
KST Abbreviation: Several time zones share KST abbreviation and it could refer to these time zones
- Korea Standard Time - UTC +9
- Pyongyang Time - UTC +8:30
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
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
Western Indonesian Time
Offset: WIB is 7 hours ahead Greenwich Mean Time (GMT) and is used in Asia
Countries: It is used in following countries: Indonesia
Principal Cities: The largest city in the WIB timezone is Jakarta from Indonesia with population about 8.54 million people. Other major cities in the area are Surabaya, Medan, Bandung, Bekasi
Daylight Saving: Western Indonesian Time (WIB) is not adjusted for daylight saving therefore WIB 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, Western Indonesian Time remains the same
WIB representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- +07 - basic short
- +0700 - basic
- +07:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- +0700 - sign character (+) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates seven 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
- Golf - Military abbreviation for WIB
- G - short form of 'Golf'
IANA/Olson: Reflects WIB time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- Asia/Jakarta
- Asia/Pontianak
Time zones with the GMT +7 offset:
- CXT - Christmas Island Time
- DAVT - Davis Time
- G - Golf Time Zone
- HOVT - Hovd Time
- ICT - Indochina Time
- KRAT - Krasnoyarsk Time
- NOVST - Novosibirsk Summer Time
- NOVT - Novosibirsk Time
- OMSST - Omsk Summer Time
- WIB - Western Indonesian Time
