IST to London, United Kingdom to UTC to BST

Time Difference

India Standard Time is 4 hours and 30 minutes ahead of BST (British Summer Time) and 5 hours and 30 minutes ahead of Universal Time Coordinated and 4 hours and 30 minutes ahead of British Summer Time
7:00 am07:00 in IST is 2:30 am02:30 in London, United Kingdom and is 1:30 am01:30 in UTC and is 2:30 am02:30 in BST

IST to London call time
Best time for a conference call or a meeting is between 12:30pm-6pm in IST which corresponds to 8am-1:30pm in London
IST to UTC call time
Best time for a conference call or a meeting is between 1:30pm-6pm in IST which corresponds to 8am-12:30pm in UTC
IST to BST call time
Best time for a conference call or a meeting is between 12:30pm-6pm in IST which corresponds to 8am-1:30pm in BST

7:00 am07:00 India Standard Time (IST). Offset UTC +5:30 hours
2:30 am02:30 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
1:30 am01:30 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
2:30 am02:30 British Summer Time (BST). Offset UTC +1:00 hour

7:00 am07:00 IST / 2:30 am02:30 London, United Kingdom / 1:30 am01:30 UTC / 2:30 am02:30 BST

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 representations, usage and related time zones

Universal Time Coordinated

Offset: UTC is 0 hours ahead Greenwich Mean Time (GMT) and is used in Universal

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.

UTC representations, usage and related time zones

British Summer Time

Offset: BST is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe

Countries: It is used in following countries: Britain (UK), Guernsey, Isle of Man, Jersey

Principal Cities: The largest city in the BST timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Birmingham, Glasgow, Liverpool, Saint Helier

Daylight Saving: British Summer Time (BST) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Greenwich Mean Time (GMT).

Start: British Summer Time (BST) started on Sunday, March 30, 2025 at 1:00 am local time and clocks were set one hour forward to Sunday, March 30, 2025, 2:00 am. Daylight saving starts annually the on last Sunday of March

End: British Summer Time (BST) ends on Sunday, October 26, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, October 26, 2025, 1:00 am local standard time instead. Daylight saving ends annually the on last Sunday of October

BST representations, usage and related time zones