GMT to IST to JST
Time Difference
Greenwich Mean Time is 5 hours and 30 minutes behind India Standard Time and 9 hours behind Japan Standard Time
4:30 am04:30 in GMT is 10:00 am10:00 in IST and is 1:30 pm13:30 in JST
GMT to IST call time
Best time for a conference call or a meeting is between 8am-12:30pm in GMT which corresponds to 1:30pm-6pm in IST
GMT to JST call time
Best time for a conference call or a meeting is between 8am-10am in GMT which corresponds to 5pm-7pm in JST
4:30 am04:30 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
10:00 am10:00 India Standard Time (IST). Offset UTC +5:30 hours
1:30 pm13:30 Japan Standard Time (JST). Offset UTC +9:00 hours
4:30 am04:30 GMT / 10:00 am10:00 IST / 1:30 pm13:30 JST
| GMT | IST | JST |
|---|---|---|
| 12am (midnight) | 5:30 am | 9am |
| 1am | 6:30 am | 10am |
| 2am | 7:30 am | 11am |
| 3am | 8:30 am | 12pm (noon) |
| 4am | 9:30 am | 1pm |
| 5am | 10:30 am | 2pm |
| 6am | 11:30 am | 3pm |
| 7am | 12:30 pm | 4pm |
| 8am | 1:30 pm | 5pm |
| 9am | 2:30 pm | 6pm |
| 10am | 3:30 pm | 7pm |
| 11am | 4:30 pm | 8pm |
| 12pm (noon) | 5:30 pm | 9pm |
| 1pm | 6:30 pm | 10pm |
| 2pm | 7:30 pm | 11pm |
| 3pm | 8:30 pm | 12am (midnight) |
| 4pm | 9:30 pm | 1am |
| 5pm | 10:30 pm | 2am |
| 6pm | 11:30 pm | 3am |
| 7pm | 12:30 am | 4am |
| 8pm | 1:30 am | 5am |
| 9pm | 2:30 am | 6am |
| 10pm | 3:30 am | 7am |
| 11pm | 4:30 am | 8am |
| 0:00 | 5:30 | 9:00 |
| 1:00 | 6:30 | 10:00 |
| 2:00 | 7:30 | 11:00 |
| 3:00 | 8:30 | 12:00 |
| 4:00 | 9:30 | 13:00 |
| 5:00 | 10:30 | 14:00 |
| 6:00 | 11:30 | 15:00 |
| 7:00 | 12:30 | 16:00 |
| 8:00 | 13:30 | 17:00 |
| 9:00 | 14:30 | 18:00 |
| 10:00 | 15:30 | 19:00 |
| 11:00 | 16:30 | 20:00 |
| 12:00 | 17:30 | 21:00 |
| 13:00 | 18:30 | 22:00 |
| 14:00 | 19:30 | 23:00 |
| 15:00 | 20:30 | 0:00 |
| 16:00 | 21:30 | 1:00 |
| 17:00 | 22:30 | 2:00 |
| 18:00 | 23:30 | 3:00 |
| 19:00 | 0:30 | 4:00 |
| 20:00 | 1:30 | 5:00 |
| 21:00 | 2:30 | 6:00 |
| 22:00 | 3:30 | 7:00 |
| 23:00 | 4:30 | 8:00 |
Greenwich Mean Time
Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries: It is used in following countries: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
Principal Cities: The largest city in the GMT timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Abidjan, Dakar, Grand Dakar, Accra
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.
GMT 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 zero hour and zero minutes time differences of the zero meridian.
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
- Africa/Abidjan
- Africa/Accra
- Africa/Bamako
- Africa/Banjul
- Africa/Bissau
- Africa/Conakry
- Africa/Dakar
- Africa/Freetown
- Africa/Lome
- Africa/Monrovia
- Africa/Nouakchott
- Africa/Ouagadougou
- Africa/Sao_Tome
- Africa/Timbuktu
- America/Danmarkshavn
- Atlantic/Reykjavik
- Atlantic/St_Helena
- Eire
- Etc/GMT
- Etc/GMT+0
- Etc/GMT-0
- Etc/GMT0
- Etc/Greenwich
- Europe/Belfast
- Europe/Dublin
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- GMT
- GMT+0
- GMT-0
- GMT0
- Greenwich
- Iceland
- Greenwich Mean Time - UTC +0
- GMT+03:00 - UTC +3
- GMT - UTC +1
- GMT+11:00 - UTC +11
- GMT-01:00 - UTC -1
- 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
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
- +0530 - basic
- +05:30 - extended
- +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.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
- Iran Standard Time - UTC +3:30
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 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 nine hour and zero minutes time differences 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