UTC
Universal Time Coordinated
GMT +0
IST
India Standard Time
GMT +5:30
SAST
South Africa Standard Time
GMT +2

Time Difference

Universal Time Coordinated is 5 hours and 30 minutes behind India Standard Time and 2 hours behind South Africa Standard Time
12:30 am00:30 in UTC is 6:00 am06:00 in IST and is 2:30 am02:30 in SAST

UTC to IST call time
Best time for a conference call or a meeting is between 8am-12:30pm in UTC which corresponds to 1:30pm-6pm in IST
UTC to SAST call time
Best time for a conference call or a meeting is between 8am-4pm in UTC which corresponds to 10am-6pm in SAST

12:30 am00:30 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
6:00 am06:00 India Standard Time (IST). Offset UTC +5:30 hours
2:30 am02:30 South Africa Standard Time (SAST). Offset UTC +2:00 hours

12:30 am00:30 UTC / 6:00 am06:00 IST / 2:30 am02:30 SAST

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

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

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

South Africa Standard Time

Offset: SAST is 2 hours ahead Greenwich Mean Time (GMT) and is used in Africa

Countries: It is used in following countries: Lesotho, Eswatini (Swaziland), South Africa

Principal Cities: The largest city in the SAST timezone is Cape Town from South Africa with population about 3.433 million people. Other major cities in the area are Durban, Johannesburg, Soweto, Pretoria

Daylight Saving: South Africa Standard Time (SAST) is not adjusted for daylight saving therefore SAST 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, South Africa Standard Time remains the same

SAST Time Zone Geo Map
SAST timezone map

SAST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +02 - basic short
  • +0200 - basic
  • +02:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0200 - sign character (+) followed by a four digit time providing hours (02) and minutes (00) of the offset. Indicates two hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Bravo - Military abbreviation for SAST
  • B - short form of 'Bravo'
IANA/Olson: Reflects SAST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Johannesburg
  • Africa/Maseru
  • Africa/Mbabane
Time zones with the GMT +2 offset:
  • CEST - Central European Summer Time
  • EET - Eastern European Time
  • MESZ - Mitteleuropäische Sommerzeit
  • B - Bravo Time Zone
  • CAT - Central Africa Time
  • IST - Israel Standard Time
  • SAST - South Africa Standard Time
  • WAST - West Africa Summer Time