IST
India Standard Time
GMT +5:30
GMT
GMT+13:00
GMT +13

Time Difference

India Standard Time is 7 hours and 30 minutes behind of GMT+13:00
9:00 pm21:00 in IST is 4:30 am04:30 in GMT

IST to GMT call time
Best time for a conference call or a meeting is between 8am-10:30am in IST which corresponds to 3:30pm-6pm in GMT

9:00 pm21:00 India Standard Time (IST). Offset UTC +5:30 hours
4:30 am04:30 GMT+13:00 (GMT). Offset UTC +13:00 hours

9:00 pm21:00 IST / 4:30 am04:30 GMT

IST GMT
12am (midnight) 7:30 am
1am 8:30 am
2am 9:30 am
3am 10:30 am
4am 11:30 am
5am 12:30 pm
6am 1:30 pm
7am 2:30 pm
8am 3:30 pm
9am 4:30 pm
10am 5:30 pm
11am 6:30 pm
12pm (noon) 7:30 pm
1pm 8:30 pm
2pm 9:30 pm
3pm 10:30 pm
4pm 11:30 pm
5pm 12:30 am
6pm 1:30 am
7pm 2:30 am
8pm 3:30 am
9pm 4:30 am
10pm 5:30 am
11pm 6:30 am
0:00 7:30
1:00 8:30
2:00 9:30
3:00 10:30
4:00 11:30
5:00 12:30
6:00 13:30
7:00 14:30
8:00 15:30
9:00 16:30
10:00 17:30
11:00 18:30
12:00 19:30
13:00 20:30
14:00 21:30
15:00 22:30
16:00 23:30
17:00 0:30
18:00 1:30
19:00 2:30
20:00 3:30
21:00 4:30
22:00 5:30
23:00 6:30

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 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 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

GMT+13:00

Offset: GMT is 13 hours ahead Greenwich Mean Time (GMT) and is used in Pacific

GMT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +13 - basic short
  • +1300 - basic
  • +13:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1300 - sign character (+) followed by a four digit time providing hours (13) and minutes (00) of the offset. Indicates thirteen hour and zero minutes time differences to the east of the zero meridian.
GMT Abbreviation: Several time zones share GMT abbreviation and it could refer to these time zones
  • Greenwich Mean Time - UTC +0
  • GMT+07:00 - UTC +7
  • GMT-03:00 - UTC -3
  • GMT - UTC +1
  • GMT+03:00 - UTC +3
  • GMT+04:00 - UTC +4
  • GMT+13:00 - UTC +13
Time zones with the GMT +13 offset:
  • FJST - Fiji Summer Time
  • NZDT - New Zealand Daylight Time
  • PHOT - Phoenix Island Time
  • TKT - Tokelau Time
  • TOT - Tonga Time
  • WST - West Samoa Time
  • WSST - West Samoa Standard Time
  • GMT - GMT+13:00