ADT to IST Converter
Quick answers
Selected conversion
9:00 am09:00 ADT (UTC-3), Oct 4, 2026 = 5:30 pm17:30 IST (UTC+5:30), Oct 4, 2026
ADT is 8 hours and 30 minutes behind IST.
ADT and IST examples
These examples always use ADT (UTC-3) and IST (UTC+5:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
ADT is 8 hours and 30 minutes behind IST.
How the time difference changes
For most of the year, ADT is 8 hours and 30 minutes behind IST. At other times of the year, AST is 9 hours and 30 minutes behind IST.
For most of the year, working hours of 9:00 am to 5:00 pm in ADT correspond to 5:30 pm to 1:30 am (next day) in IST. At other times of the year, working hours of 9:00 am to 5:00 pm in AST correspond to 6:30 pm to 2:30 am (next day) in IST.For most of the year, working hours of 09:00 to 17:00 in ADT correspond to 17:30 to 01:30 (next day) in IST. At other times of the year, working hours of 09:00 to 17:00 in AST correspond to 18:30 to 02:30 (next day) in IST.
Compare ADT time with IST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Atlantic Daylight Time is 8 hours and 30 minutes behind India Standard Time.
9:00 am09:00 in ADT is 5:30 pm17:30 in IST
ADT to IST call time
Best time for a conference call or a meeting is between 8:30am-9:30am08:30-09:30 in ADT which corresponds to 5pm-6pm17:00-18:00 in IST
9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
9:00 am09:00 ADT / 5:30 pm17:30 IST
| ADT | IST |
|---|---|
| 12:00am | 8:30am |
| 1:00am | 9:30am |
| 2:00am | 10:30am |
| 3:00am | 11:30am |
| 4:00am | 12:30pm |
| 5:00am | 1:30pm |
| 6:00am | 2:30pm |
| 7:00am | 3:30pm |
| 8:00am | 4:30pm |
| 9:00am | 5:30pm |
| 10:00am | 6:30pm |
| 11:00am | 7:30pm |
| 12:00pm | 8:30pm |
| 1:00pm | 9:30pm |
| 2:00pm | 10:30pm |
| 3:00pm | 11:30pm |
| 4:00pm | 12:30am |
| 5:00pm | 1:30am |
| 6:00pm | 2:30am |
| 7:00pm | 3:30am |
| 8:00pm | 4:30am |
| 9:00pm | 5:30am |
| 10:00pm | 6:30am |
| 11:00pm | 7:30am |
| 00:00 | 08:30 |
| 01:00 | 09:30 |
| 02:00 | 10:30 |
| 03:00 | 11:30 |
| 04:00 | 12:30 |
| 05:00 | 13:30 |
| 06:00 | 14:30 |
| 07:00 | 15:30 |
| 08:00 | 16:30 |
| 09:00 | 17:30 |
| 10:00 | 18:30 |
| 11:00 | 19:30 |
| 12:00 | 20:30 |
| 13:00 | 21:30 |
| 14:00 | 22:30 |
| 15:00 | 23:30 |
| 16:00 | 00:30 |
| 17:00 | 01:30 |
| 18:00 | 02:30 |
| 19:00 | 03:30 |
| 20:00 | 04:30 |
| 21:00 | 05:30 |
| 22:00 | 06:30 |
| 23:00 | 07:30 |
Atlantic Daylight Time
Offset: ADT is 3 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries using this time zone: Bermuda, Canada, Greenland
Principal Cities: The largest city in the ADT time zone is Halifax in Canada, with about 471,559 people. Other major cities in this time zone include Sydney, Dartmouth, Moncton, Saint John.
French: HAA - Heure Avancée de l'Atlantique
Daylight Saving: Atlantic Daylight Time (ADT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Atlantic Standard Time (AST).
Start: Atlantic Daylight Time (ADT) started on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.
End: Atlantic Daylight Time (ADT) ends on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.
ADT representations, usage and related time zones
- -03 - basic short
- -0300 - basic
- -03:00 - extended
- -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates an offset of three hours to the west of the zero meridian.
- Papa - Military abbreviation for ADT
- P - short form of 'Papa'
- America/Glace_Bay
- America/Goose_Bay
- America/Halifax
- America/Moncton
- America/Thule
- Atlantic/Bermuda
- Canada/Atlantic
- ADT - Atlantic Daylight Time
- PMT - Pierre & Miquelon Standard Time
- PMST - Pierre & Miquelon Standard 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
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bangalore, Chennai, Kolkata.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2