IST is 5 hours and 30 minutes ahead of GMT (winter) or 4 hours and 30 minutes ahead of BST (summer)
What is the time difference between London and IST?
The time difference between London and Indian Standard Time (IST) depends on whether Daylight Saving Time is in effect. During standard time (GMT), IST is 5 hours and 30 minutes ahead. During daylight time (BST), IST is 4 hours and 30 minutes ahead.