because if there is no standard time then there will be confusipns in the rail way airlines country as different countries have many time zones
IST is taken as the standard time as it passes through almost the centre of India. To communicate the exact time to the people, the exact time is broadcast over the state--owned All India Radio and Doordarshan television network.
Unlike Europe, Africa and North America, which use time zone designations that are shared by multiple countries, most of the time zones in Asia and South America are named after the countries where they are located. (There are exceptions, such as Indochina Time, Gulf Standard Time and Arabia Standard Time.)
Indian Standard Time (IST) is the time observed throughout India with a time offset of UTC+05:30 it thus tells the time throughout the country which is to followed and then the time difference between various states is differntiated
To avoid any confusion for time indian constitution has set up mizrapur as the standard time of india,
To confuse pilots
what is the standard time of india
It will be 6.00 PM in Indian standard time
indian standard time for 3.45 pm CST will be 4.15 am IST
allahbad
10.30 pm
India falls in the Indian Standard Time (IST) time zone, which is UTC+5:30.
Indian Standard Time is calculated with a time offset of UTC + 5:30. If it is midnight UTC, then it will be 5:30am IST (Indian Standard Time). Indian Standard Time also covers Sri Lanka and the islands of Lakshadweep.
It will be 6.00 PM in Indian standard time
indian standard time for 3.45 pm CST will be 4.15 am IST
The world is divided into different time zones (In the US, you may see Eastern Standard Time or Central Standard time, etc) Indian Standard time is the common time zone for all of India.
Indian Standard Time is the time that is observed throughout most of India and Sri Lanka. India does not observe daylight savings time.
Indian Standard Time
allahbad
Pakistan
The full form of IST is Indian Standard Time. It is the time standard used in India and is 5 hours and 30 minutes ahead of Coordinated Universal Time (UTC+5:30).
10.30 pm
Indian Standard Time
allahabad