GST
Gulf Standard Time
GMT +4
IST
India Standard Time
GMT +5:30

Time Difference

Gulf Standard Time is 1 hours and 30 minutes behind India Standard Time
10:30 pm22:30 in GST is 12:00 am00:00 in IST

GST to IST call time
Best time for a conference call or a meeting is between 8am-4:30pm in GST which corresponds to 9:30am-6pm in IST

10:30 pm22:30 Gulf Standard Time (GST). Offset UTC +4:00 hours
12:00 am00:00 India Standard Time (IST). Offset UTC +5:30 hours

10:30 pm22:30 GST / 12:00 am00:00 IST

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

Gulf Standard Time

Offset: GST is 4 hours ahead Greenwich Mean Time (GMT) and is used in Asia

GST Time Zone Geo Map
GST timezone map

GST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +04 - basic short
  • +0400 - basic
  • +04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0400 - sign character (+) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates four 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
  • Delta - Military abbreviation for GST
  • D - short form of 'Delta'
GST Abbreviation: Several time zones share GST abbreviation and it could refer to these time zones
  • Gulf Standard Time - UTC +4
  • Georgia Standard Time - UTC +4
Time zones with the GMT +4 offset:
  • KUYT - Kuybyshev Time
  • MSD - Moscow Daylight Time
  • SAMT - Samara Time
  • AMT - Armenia Time
  • AZT - Azerbaijan Time
  • D - Delta Time Zone
  • GET - Georgia Standard Time
  • GST - Gulf Standard Time
  • MUT - Mauritius Time
  • RET - Reunion Time
  • SCT - Seychelles Time

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