IST to EST to AEST to BST Time Converter
Eastern Australia is on daylight saving time: AEDT (UTC+11) until Sun, Apr 4, 2027.
Queensland stays on AEST (UTC+10).
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Selected conversion
5:30 pm17:30 IST (UTC+5:30), Oct 23, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 23, 2026 = 10:00 pm22:00 AEST (UTC+10), Oct 23, 2026 = 1:00 pm13:00 BST (UTC+1), Oct 23, 2026
IST is 9 hours and 30 minutes ahead of EDT. IST is 4 hours and 30 minutes behind AEST. IST is 4 hours and 30 minutes ahead of BST.
How the time difference changes
IST to EST
For most of the year, IST is 9 hours and 30 minutes ahead of EDT. From Nov 1, 2026 to Mar 14, 2027, IST is 10 hours and 30 minutes ahead of EST.
For most of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 11:30 pm (previous day) to 8:30 am in EDT. At other times of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 10:30 pm (previous day) to 7:30 am in EST.For most of the year, working hours of 09:00 to 18:00 in IST correspond to 23:30 (previous day) to 08:30 in EDT. At other times of the year, working hours of 09:00 to 18:00 in IST correspond to 22:30 (previous day) to 07:30 in EST.
IST to AEST
IST is 4 hours and 30 minutes behind AEST year-round.
Working hours of 9:00 am to 6:00 pm in IST correspond to 1:30 pm to 10:30 pm in AEST.Working hours of 09:00 to 18:00 in IST correspond to 13:30 to 22:30 in AEST.
IST to BST
For most of the year, IST is 4 hours and 30 minutes ahead of BST. From Oct 25, 2026 to Mar 28, 2027, IST is 5 hours and 30 minutes ahead of GMT.
For most of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 4:30 am to 1:30 pm in BST. At other times of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 3:30 am to 12:30 pm in GMT.For most of the year, working hours of 09:00 to 18:00 in IST correspond to 04:30 to 13:30 in BST. At other times of the year, working hours of 09:00 to 18:00 in IST correspond to 03:30 to 12:30 in GMT.
Compare IST time with EST, AEST, and BST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
India Standard Time is 9 hours and 30 minutes ahead of Eastern Daylight Time. India Standard Time is 4 hours and 30 minutes behind Australian Eastern Standard Time. India Standard Time is 4 hours and 30 minutes ahead of British Summer Time.
5:30 pm17:30 in IST is 8:00 am08:00 in EDT and is 10:00 pm22:00 in AEST and is 1:00 pm13:00 in BST
IST to EDT call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in IST which corresponds to 8:30am-9:30am08:30-09:30 in EDT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
IST to AEST call time
Best time for a conference call or a meeting is between 9am-1:30pm09:00-13:30 in IST which corresponds to 1:30pm-6pm13:30-18:00 in AEST
IST to BST call time
Best time for a conference call or a meeting is between 1:30pm-6pm13:30-18:00 in IST which corresponds to 9am-1:30pm09:00-13:30 in BST
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
10:00 pm22:00 Australian Eastern Standard Time (AEST). Offset UTC +10:00 hours
1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
5:30 pm17:30 IST / 8:00 am08:00 EDT / 10:00 pm22:00 AEST / 1:00 pm13:00 BST
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| IST | EDT | AEST | BST |
|---|---|---|---|
| 2:30pm previous day | 4:30am | 7:30pm previous day | |
| 3:30pm previous day | 5:30am | 8:30pm previous day | |
| 4:30pm previous day | 6:30am | 9:30pm previous day | |
| 5:30pm previous day | 7:30am | 10:30pm previous day | |
| 6:30pm previous day | 8:30am | 11:30pm previous day | |
| 7:30pm previous day | 9:30am | 12:30am | |
| 8:30pm previous day | 10:30am | 1:30am | |
| 9:30pm previous day | 11:30am | 2:30am | |
| 10:30pm previous day | 12:30pm | 3:30am | |
| 11:30pm previous day | 1:30pm | 4:30am | |
| 12:30am | 2:30pm | 5:30am | |
| 1:30am | 3:30pm | 6:30am | |
| 2:30am | 4:30pm | 7:30am | |
| 3:30am | 5:30pm | 8:30am | |
| 4:30am | 6:30pm | 9:30am | |
| 5:30am | 7:30pm | 10:30am | |
| 6:30am | 8:30pm | 11:30am | |
| 7:30am | 9:30pm | 12:30pm | |
| 8:30am | 10:30pm | 1:30pm | |
| 9:30am | 11:30pm | 2:30pm | |
| 10:30am | 12:30am next day | 3:30pm | |
| 11:30am | 1:30am next day | 4:30pm | |
| 12:30pm | 2:30am next day | 5:30pm | |
| 1:30pm | 3:30am next day | 6:30pm | |
| 14:30 previous day | 04:30 | 19:30 previous day | |
| 15:30 previous day | 05:30 | 20:30 previous day | |
| 16:30 previous day | 06:30 | 21:30 previous day | |
| 17:30 previous day | 07:30 | 22:30 previous day | |
| 18:30 previous day | 08:30 | 23:30 previous day | |
| 19:30 previous day | 09:30 | 00:30 | |
| 20:30 previous day | 10:30 | 01:30 | |
| 21:30 previous day | 11:30 | 02:30 | |
| 22:30 previous day | 12:30 | 03:30 | |
| 23:30 previous day | 13:30 | 04:30 | |
| 00:30 | 14:30 | 05:30 | |
| 01:30 | 15:30 | 06:30 | |
| 02:30 | 16:30 | 07:30 | |
| 03:30 | 17:30 | 08:30 | |
| 04:30 | 18:30 | 09:30 | |
| 05:30 | 19:30 | 10:30 | |
| 06:30 | 20:30 | 11:30 | |
| 07:30 | 21:30 | 12:30 | |
| 08:30 | 22:30 | 13:30 | |
| 09:30 | 23:30 | 14:30 | |
| 10:30 | 00:30 next day | 15:30 | |
| 11:30 | 01:30 next day | 16:30 | |
| 12:30 | 02:30 next day | 17:30 | |
| 13:30 | 03:30 next day | 18:30 |
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
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, Bengaluru, Hyderabad, Ahmedabad.
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.
Current time in India: India time now
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
Eastern Standard Time
Offset: EST is 5 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Bahamas, Canada, Cayman Islands, Haiti, Jamaica, Mexico, Panama, Turks and Caicos Islands, United States
Principal Cities: The largest city in the EST time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.
French: HNE - Heure Normale de l'Est
Spanish: ET - Tiempo del Este, ET - Zona Sureste
Today the lighter areas are on UTC−4 (EDT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Eastern Daylight Time (EDT).
End: Eastern Standard Time (EST) ended 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 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Eastern Standard Time (EST) starts 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. Standard time starts annually on the first Sunday of November.
See USA daylight saving time and upcoming clock changes worldwide.
EST representations, usage and related time zones
- -05 - basic short
- -0500 - basic
- -05:00 - extended
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
- Romeo - Military abbreviation for EST
- R - short form of 'Romeo'
- America/Atikokan
- America/Cancun
- America/Cayman
- America/Coral_Harbour
- America/Detroit
- America/Fort_Wayne
- America/Grand_Turk
- America/Indiana/Indianapolis
- America/Indiana/Marengo
- America/Indiana/Petersburg
- America/Indiana/Vevay
- America/Indiana/Vincennes
- America/Indiana/Winamac
- America/Indianapolis
- America/Iqaluit
- America/Jamaica
- America/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Panama
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST
- EST5EDT
- Jamaica
- US/East-Indiana
- US/Eastern
- US/Michigan
- CDT - Central Daylight Time
- EST - Eastern Standard Time
- ET - Eastern Time
- COT - Colombia Time
- CST - Cuba Standard Time
- EASST - Easter Island Summer Time
- ECT - Ecuador Time
- PET - Peru Time
- R - Romeo Time Zone
Australian Eastern Standard Time
Offset: AEST is 10 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Australia
Principal Cities: The largest city in the AEST time zone is Sydney in Australia, with about 5.639 million people. Other major cities in this time zone include Melbourne, Brisbane, Gold Coast, Newcastle.
Today the lighter areas are on UTC+11 (AEDT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Australian Eastern Daylight Time (AEDT).
End: Australian Eastern Standard Time (AEST) ended on Sunday, October 4, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, October 4, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the first Sunday of October.
Start: Australian Eastern Standard Time (AEST) starts on Sunday, April 4, 2027 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:00 am02:00. Standard time starts annually on the first Sunday of April.
See Australia daylight saving time and upcoming clock changes worldwide.
Australian Eastern Standard Time (AEST) is used in Queensland, Victoria, Tasmania, New South Wales (except Broken Hill), Australian Capital Territory and in folling major cities Brisbane, Sydney, Melbourne, Hobart, Canberra
Only part of Australia observe daylight saving. It is used in New South Wales, Victoria, South Australia, Tasmania, and the Australian Capital Territory. Daylight saving is not observed in Queensland, Western Australia or the Northern Territory.
AEST representations, usage and related time zones
- +10 - basic short
- +1000 - basic
- +10:00 - extended
- +1000 - sign character (+) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates an offset of ten hours to the east of the zero meridian.
- Kilo - Military abbreviation for AEST
- K - short form of 'Kilo'
- Antarctica/Macquarie
- Australia/ACT
- Australia/Brisbane
- Australia/Canberra
- Australia/Currie
- Australia/Hobart
- Australia/Lindeman
- Australia/Melbourne
- Australia/NSW
- Australia/Queensland
- Australia/Sydney
- Australia/Tasmania
- Australia/Victoria
- AEST - Australian Eastern Standard Time
- CHUT - Chuuk Time
- ChST - Chamorro Standard Time
- K - Kilo Time Zone
- KDT - Korea Daylight Time
- PGT - Papua New Guinea Time
- VLAT - Vladivostok Time
- YAKST - Yakutsk Summer Time
- YAPT - Yap Time
British Summer Time
Offset: BST is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Guernsey, Isle of Man, Jersey, United Kingdom
Principal Cities: The largest city in the BST time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Manchester, Sheffield.
Current time in the United Kingdom: UK time now
Today all shaded areas are on BST.
Daylight Saving: British Summer Time (BST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Greenwich Mean Time (GMT).
Start: British Summer Time (BST) started on Sunday, March 29, 2026 at 1:00 am01:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 2:00 am02:00. Daylight saving starts annually on the last Sunday of March.
End: British Summer Time (BST) ends on Sunday, October 25, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.
See United Kingdom daylight saving time and upcoming clock changes worldwide.
BST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for BST
- A - short form of 'Alpha'
- Europe/Belfast
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- British Summer Time - UTC +1
- Bangladesh Standard Time - UTC +6
- Bougainville Standard Time - UTC +11
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time