IST
India Standard Time
GMT +5:30
ACDT
Australian Central Daylight Time
GMT +10:30

Time Difference

India Standard Time is 5 hours behind of Australian Central Daylight Time
3:30 am03:30 in IST is 8:30 am08:30 in ACDT

IST to ACDT call time
Best time for a conference call or a meeting is between 8am-1pm in IST which corresponds to 1pm-6pm in ACDT

3:30 am03:30 India Standard Time (IST). Offset UTC +5:30 hours
8:30 am08:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours

3:30 am03:30 IST / 8:30 am08:30 ACDT

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

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

Australian Central Daylight Time

Offset: ACDT is 10 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia

Countries: It is used in following countries: Australia

Principal Cities: The largest city in the ACDT timezone is Adelaide from Australia with population about 1.225 million people. Other major cities in the area are Adelaide Hills, Mount Gambier, Morphett Vale, Prospect

Daylight Saving: Australian Central Daylight Time (ACDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Australian Central Standard Time (ACST).

Start: Australian Central Daylight Time (ACDT) started and clocks were set one hour forward on Sunday, 04 October 2020, at 2:00 (2:00 am) local time.

End: Australian Central Daylight Time (ACDT) ends and clocks are set one hour back on Sunday, 04 April 2021, at 3:00 (3:00 am) local time.

ACDT Time Zone Geo Map
ACDT timezone map

ACDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1030 - basic
  • +10:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1030 - sign character (+) followed by a four digit time providing hours (10) and minutes (30) of the offset. Indicates ten hour and thirty minutes time differences to the east of the zero meridian.
IANA/Olson: Reflects ACDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/Adelaide
  • Australia/Broken_Hill
  • Australia/South
  • Australia/Yancowinna
Time zones with the GMT +10:30 offset:
  • ACDT - Australian Central Daylight Time
  • LHST - Lord Howe Standard Time