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GMT
Greenwich Mean Time
GMT +0
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6pm
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+05:30
+05:30 GMT
GMT +5:30
12am
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9am
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+05:30 is not used on this date
This converter keeps +05:30 at GMT +5:30. Kolkata uses IST (GMT +5:30) on this date. Open the IST converter, or choose Mumbai, Delhi, or Bangalore for city-specific time.

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GMT and +05:30 examples

These examples always use GMT (UTC+0) and +05:30 (UTC+5:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

GMT is 5 hours and 30 minutes behind +05:30.

How the time difference changes

GMT is 5 hours and 30 minutes behind +05:30 year-round.

Working hours of 9:00 am to 5:00 pm in GMT correspond to 2:30 pm to 10:30 pm in +05:30.

Compare GMT time with +05:30 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 +05:30 GMT
12:00 pm12:00 in GMT is 5:30 pm17:30 in +05:30

GMT to +05:30 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 +05:30

12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
5:30 pm17:30 +05:30 GMT (+05:30). Offset UTC +5:30 hours

12:00 pm12:00 GMT / 5:30 pm17:30 +05:30

GMT+05:30
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 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 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Dakar, Kumasi.

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 Time Zone Geo Map
GMT timezone map

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

+05:30 GMT

Offset: +05:30 is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

Daylight Saving: Clocks in +05:30 GMT (+05:30) do not change for daylight saving time, so +05:30 stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.

+05:30 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.