IST
India Standard Time
GMT +5:30
-03
GMT -3
-03 is NOT in use by many locations
-04 () is used instead. Switch to -04 time zone or select one of the cities Buenos Aires, Sao Paolo, Rio de Janeiro) for automatic timezone change.

Time Difference

India Standard Time is 8 hours and 30 minutes ahead of
10:00 pm22:00 in IST is 1:30 pm13:30 in -03

IST to -03 call time
Best time for a conference call or a meeting is between 4:30pm-6:30pm in IST which corresponds to 8am-10am in -03

10:00 pm22:00 India Standard Time (IST). Offset UTC +5:30 hours
1:30 pm13:30 (-03). Offset UTC -3:00 hours

10:00 pm22:00 IST / 1:30 pm13:30 -03

IST -03
12am (midnight) 3:30 pm
1am 4:30 pm
2am 5:30 pm
3am 6:30 pm
4am 7:30 pm
5am 8:30 pm
6am 9:30 pm
7am 10:30 pm
8am 11:30 pm
9am 12:30 am
10am 1:30 am
11am 2:30 am
12pm (noon) 3:30 am
1pm 4:30 am
2pm 5:30 am
3pm 6:30 am
4pm 7:30 am
5pm 8:30 am
6pm 9:30 am
7pm 10:30 am
8pm 11:30 am
9pm 12:30 pm
10pm 1:30 pm
11pm 2:30 pm
0:00 15:30
1:00 16:30
2:00 17:30
3:00 18:30
4:00 19:30
5:00 20:30
6:00 21:30
7:00 22:30
8:00 23:30
9:00 0:30
10:00 1:30
11:00 2:30
12:00 3:30
13:00 4:30
14:00 5:30
15:00 6:30
16:00 7:30
17:00 8:30
18:00 9:30
19:00 10:30
20:00 11:30
21:00 12:30
22:00 13:30
23:00 14:30

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
  • Iran Standard Time - UTC +3:30

-03

Offset: -03 is 3 hours behind Greenwich Mean Time (GMT) and is used in America

Countries: It is used in following countries: Antarctica, Argentina, Brazil, Chile, Falkland Islands, French Guiana, Greenland, St Pierre & Miquelon, Paraguay, Suriname, Uruguay

Principal Cities: The largest city in the -03 timezone is Buenos Aires from Argentina with population about 13.076 million people. Other major cities in the area are Sao Paolo, Rio de Janeiro, Santiago, Salvador

Daylight Saving: (-03) is a daylight saving/summer time zone, however during winter some places adjust time for one hour back and observe (-04).

Daylight saving time clock moves back for one hour from 12am to 11pmEnd: (-03) has ended on Sunday, March 24, 2024 at 12:00 am local time and clocks were set one hour back to Saturday, March 23, 2024, 11:00 pm local standard time instead. Daylight saving ends

Daylight saving time clock moves forward for one hour from 12am to 1amStart: (-03) starts on Sunday, October 6, 2024 at 12:00 am local time and clocks are set one hour forward to Sunday, October 6, 2024, 1:00 am. Daylight saving starts

-03 representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -03 - basic short
  • -0300 - basic
  • -03:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates three hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Papa - Military abbreviation for -03
  • P - short form of 'Papa'
IANA/Olson: Reflects -03 time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Araguaina
  • America/Argentina/Buenos_Aires
  • America/Argentina/Catamarca
  • America/Argentina/ComodRivadavia
  • America/Argentina/Cordoba
  • America/Argentina/Jujuy
  • America/Argentina/La_Rioja
  • America/Argentina/Mendoza
  • America/Argentina/Rio_Gallegos
  • America/Argentina/Salta
  • America/Argentina/San_Juan
  • America/Argentina/San_Luis
  • America/Argentina/Tucuman
  • America/Argentina/Ushuaia
  • America/Asuncion
  • America/Bahia
  • America/Belem
  • America/Buenos_Aires
  • America/Catamarca
  • America/Cayenne
  • America/Cordoba
  • America/Fortaleza
  • America/Godthab
  • America/Jujuy
  • America/Maceio
  • America/Mendoza
  • America/Miquelon
  • America/Montevideo
  • America/Nuuk
  • America/Paramaribo
  • America/Punta_Arenas
  • America/Recife
  • America/Rosario
  • America/Santarem
  • America/Santiago
  • America/Sao_Paulo
  • Antarctica/Palmer
  • Antarctica/Rothera
  • Atlantic/Stanley
  • Brazil/East
  • Chile/Continental
  • Etc/GMT+3
Time zones with the GMT -3 offset:
  • ADT - Atlantic Daylight Time
  • PMT - Pierre & Miquelon Standard Time
  • PMST - Pierre & Miquelon Standard Time
  • WGT - West Greenland Time
  • AMST - Amazon Summer Time
  • ART - Argentina Time
  • BRT - Brasília time
  • CLST - Chile Summer Time
  • FKST - Falkland Islands Summer Time
  • GFT - French Guiana Time
  • P - Papa Time Zone
  • PYST - Paraguay Summer Time
  • SRT - Suriname Time
  • UYT - Uruguay Time