Updating current time…
GMT
Greenwich Mean Time
GMT +0
12am
3am
6am
9am
12pm
3pm
6pm
9pm
IST
India Standard Time
GMT +5:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

GMT Africa is 5 hours and 30 minutes behind IST year-round.

Working hours of 9:00 am to 5:00 pm in GMT Africa correspond to 2:30 pm to 10:30 pm in IST.

For example, 12:00 pm GMT is 5:30 pm IST. Use the converter above to adjust the date or time and create a shareable meeting link.

Best meeting overlap: 9am-11:30am GMT, which is 2:30pm-5pm IST.

Compare GMT time with IST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Greenwich Mean Time is 5 hours and 30 minutes behind India Standard Time
12:00 pm12:00 in GMT is 5:30 pm17:30 in IST

GMT to IST call time
Best time for a conference call or a meeting is between 9am-11:30am in GMT which corresponds to 2:30pm-5pm in IST

12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours

12:00 pm12:00 GMT / 5:30 pm17:30 IST

GMTIST
12am (midnight)5:30 am
1am6:30 am
2am7:30 am
3am8:30 am
4am9:30 am
5am10:30 am
6am11:30 am
7am12:30 pm
8am1:30 pm
9am2:30 pm
10am3:30 pm
11am4:30 pm
12pm (noon)5:30 pm
1pm6:30 pm
2pm7:30 pm
3pm8:30 pm
4pm9:30 pm
5pm10:30 pm
6pm11:30 pm
7pm12:30 am
8pm1:30 am
9pm2:30 am
10pm3:30 am
11pm4:30 am
00:0005:30
01:0006:30
02:0007:30
03:0008:30
04:0009:30
05:0010:30
06:0011:30
07:0012:30
08:0013:30
09:0014:30
10:0015:30
11:0016:30
12:0017:30
13:0018:30
14:0019:30
15:0020:30
16:0021:30
17:0022:30
18:0023:30
19:0000:30
20:0001:30
21:0002:30
22:0003:30
23:0004:30

Greenwich Mean Time

Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Africa

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.

Daylight Saving: Clocks in Greenwich Mean Time (GMT) do not change for daylight saving time, so GMT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.

GMT 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 the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for GMT
  • Z - short form of 'Zulu'
IANA/Olson: Reflects GMT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • 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
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

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 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 an offset of five hours and thirty minutes 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