UTC to IST to GMT to CET
Compare UTC time with IST, GMT, and CET time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Universal Time Coordinated is 5 hours and 30 minutes behind India Standard Time and 0 hours ahead of Greenwich Mean Time and 1 hour behind Central European Time
12:00 pm12:00 in UTC is 5:30 pm17:30 in IST and is 12:00 pm12:00 in GMT and is 1:00 pm13:00 in CET
UTC to IST call time
Best time for a conference call or a meeting is between 9am-11:30am in UTC which corresponds to 2:30pm-5pm in IST
UTC to GMT call time
Best time for a conference call or a meeting is between 9am-5pm in UTC which corresponds to 9am-5pm in GMT
UTC to CET call time
Best time for a conference call or a meeting is between 9am-4pm in UTC which corresponds to 10am-5pm in CET
12:00 pm12:00 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
1:00 pm13:00 Central European Time (CET). Offset UTC +1:00 hour
12:00 pm12:00 UTC / 5:30 pm17:30 IST / 12:00 pm12:00 GMT / 1:00 pm13:00 CET
| UTC | IST | GMT | CET |
|---|---|---|---|
| 12am (midnight) | 5:30 am | 12am (midnight) | 1am |
| 1am | 6:30 am | 1am | 2am |
| 2am | 7:30 am | 2am | 3am |
| 3am | 8:30 am | 3am | 4am |
| 4am | 9:30 am | 4am | 5am |
| 5am | 10:30 am | 5am | 6am |
| 6am | 11:30 am | 6am | 7am |
| 7am | 12:30 pm | 7am | 8am |
| 8am | 1:30 pm | 8am | 9am |
| 9am | 2:30 pm | 9am | 10am |
| 10am | 3:30 pm | 10am | 11am |
| 11am | 4:30 pm | 11am | 12pm (noon) |
| 12pm (noon) | 5:30 pm | 12pm (noon) | 1pm |
| 1pm | 6:30 pm | 1pm | 2pm |
| 2pm | 7:30 pm | 2pm | 3pm |
| 3pm | 8:30 pm | 3pm | 4pm |
| 4pm | 9:30 pm | 4pm | 5pm |
| 5pm | 10:30 pm | 5pm | 6pm |
| 6pm | 11:30 pm | 6pm | 7pm |
| 7pm | 12:30 am | 7pm | 8pm |
| 8pm | 1:30 am | 8pm | 9pm |
| 9pm | 2:30 am | 9pm | 10pm |
| 10pm | 3:30 am | 10pm | 11pm |
| 11pm | 4:30 am | 11pm | 12am (midnight) |
| 00:00 | 05:30 | 00:00 | 01:00 |
| 01:00 | 06:30 | 01:00 | 02:00 |
| 02:00 | 07:30 | 02:00 | 03:00 |
| 03:00 | 08:30 | 03:00 | 04:00 |
| 04:00 | 09:30 | 04:00 | 05:00 |
| 05:00 | 10:30 | 05:00 | 06:00 |
| 06:00 | 11:30 | 06:00 | 07:00 |
| 07:00 | 12:30 | 07:00 | 08:00 |
| 08:00 | 13:30 | 08:00 | 09:00 |
| 09:00 | 14:30 | 09:00 | 10:00 |
| 10:00 | 15:30 | 10:00 | 11:00 |
| 11:00 | 16:30 | 11:00 | 12:00 |
| 12:00 | 17:30 | 12:00 | 13:00 |
| 13:00 | 18:30 | 13:00 | 14:00 |
| 14:00 | 19:30 | 14:00 | 15:00 |
| 15:00 | 20:30 | 15:00 | 16:00 |
| 16:00 | 21:30 | 16:00 | 17:00 |
| 17:00 | 22:30 | 17:00 | 18:00 |
| 18:00 | 23:30 | 18:00 | 19:00 |
| 19:00 | 00:30 | 19:00 | 20:00 |
| 20:00 | 01:30 | 20:00 | 21:00 |
| 21:00 | 02:30 | 21:00 | 22:00 |
| 22:00 | 03:30 | 22:00 | 23:00 |
| 23:00 | 04:30 | 23:00 | 00:00 |
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
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
Greenwich Mean Time
Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries using this time zone: 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 time zone is London in United Kingdom, with about 7.557 million people. Other major cities in this time zone include 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 the zero UTC/GMT offset.
- 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
- 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 European Time
Offset: CET is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe
Countries using this time zone: Andorra, Albania, Austria, Bosnia & Herzegovina, Belgium, Switzerland, Czech Republic, Germany, Denmark, Algeria, Spain, France, Gibraltar, Croatia, Hungary, Italy, Liechtenstein, Luxembourg, Monaco, Montenegro, North Macedonia, Malta, Netherlands, Norway, Poland, Serbia, Sweden, Slovenia, Svalbard & Jan Mayen, Slovakia, San Marino, Tunisia, Vatican City
Principal Cities: The largest city in the CET time zone is Berlin in Germany, with about 3.426 million people. Other major cities in this time zone include Madrid, Rome, Paris, Algiers.
German: MEZ - Mitteleuropäische Zeit
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central European Summer Time (CEST).
Start: Central European Time (CET) started on Sunday, October 26, 2025 at 3:00 am local time and clocks were set one hour back to Sunday, October 26, 2025, 2:00 am. Standard time starts annually on the last Sunday of October.
End: Central European Time (CET) ends on Sunday, March 29, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 29, 2026, 3:00 am local daylight time instead. Standard time ends annually on the last Sunday of March.
CET representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for CET
- A - short form of 'Alpha'
- Africa/Algiers
- Africa/Ceuta
- Africa/Tunis
- Arctic/Longyearbyen
- Atlantic/Jan_Mayen
- CET
- Europe/Amsterdam
- Europe/Andorra
- Europe/Belgrade
- Europe/Berlin
- Europe/Bratislava
- Europe/Brussels
- Europe/Budapest
- Europe/Busingen
- Europe/Copenhagen
- Europe/Gibraltar
- Europe/Ljubljana
- Europe/Luxembourg
- Europe/Madrid
- Europe/Malta
- Europe/Monaco
- Europe/Oslo
- Europe/Paris
- Europe/Podgorica
- Europe/Prague
- Europe/Rome
- Europe/San_Marino
- Europe/Sarajevo
- Europe/Skopje
- Europe/Stockholm
- Europe/Tirane
- Europe/Vaduz
- Europe/Vatican
- Europe/Vienna
- Europe/Warsaw
- Europe/Zagreb
- Europe/Zurich
- MET
- Poland
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time