Question

what do you mean by Indian standard time

Answer 1

Indian Standard Time (IST) is the timeobserved throughout India, with a timeoffset of UTC+05:30. India does not observe daylight saving time (DST) or other seasonal adjustments. In military and aviation time IST is designated E* ("Echo-Star").

Answer 2

$Hey Mate!!HereIsYourAnswer:$

Indian Standard Time is the Indian Time that is followed everywhere in India.
82 & 1/2° is the Standard Time of India.

$Hope It Helps you!!$