IST
India Standard Time
GMT +5:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
AST
Arabia Standard Time
GMT +3
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Time Difference

India Standard Time is 2 hours and 30 minutes ahead of Arabia Standard Time
5:30 pm17:30 in IST is 3:00 pm15:00 in AST

IST to AST call time
Best time for a conference call or a meeting is between 11:30am-5pm in IST which corresponds to 9am-2:30pm in AST

5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
3:00 pm15:00 Arabia Standard Time (AST). Offset UTC +3:00 hours

5:30 pm17:30 IST / 3:00 pm15:00 AST

ISTAST
12am (midnight)9:30 pm
1am10:30 pm
2am11:30 pm
3am12:30 am
4am1:30 am
5am2:30 am
6am3:30 am
7am4:30 am
8am5:30 am
9am6:30 am
10am7:30 am
11am8:30 am
12pm (noon)9:30 am
1pm10:30 am
2pm11:30 am
3pm12:30 pm
4pm1:30 pm
5pm2:30 pm
6pm3:30 pm
7pm4:30 pm
8pm5:30 pm
9pm6:30 pm
10pm7:30 pm
11pm8:30 pm
00:0021:30
01:0022:30
02:0023:30
03:0000:30
04:0001:30
05:0002:30
06:0003:30
07:0004:30
08:0005:30
09:0006:30
10:0007:30
11:0008:30
12:0009:30
13:0010:30
14:0011:30
15:0012:30
16:0013:30
17:0014:30
18:0015:30
19:0016:30
20:0017:30
21:0018:30
22:0019:30
23:0020:30

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

Arabia Standard Time

Offset: AST is 3 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: Saudi Arabia

Principal Cities: The largest city in the AST timezone is Riyadh from Saudi Arabia with population about 4.206 million people. Other major cities in the area are Jeddah, Mecca, Medina, Sultanah

Daylight Saving: Arabia Standard Time (AST) is not adjusted for daylight saving therefore AST 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, Arabia Standard Time remains the same

AST Time Zone Geo Map
AST timezone map

AST 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 east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Charlie - Military abbreviation for AST
  • C - short form of 'Charlie'
AST Abbreviation: Several time zones share AST abbreviation and it could refer to these time zones
  • Atlantic Standard Time - UTC -4
  • Arabia Standard Time - UTC +3
Time zones with the GMT +3 offset:
  • EEST - Eastern European Summer Time
  • MSK - Moscow Standard Time
  • AST - Arabia Standard Time
  • C - Charlie Time Zone
  • EAT - Eastern Africa Time
  • FET - Further Eastern European Time
  • IDT - Israel Daylight Time
  • TRT - Turkey Time