|At its widest point, India is about 2,000 miles, which
equals 2 time zones (The math: earth is 24,000 or so miles
in circumference and there’s 24 hours in a day …).
In the north and south, as you can see, it tapers off.
Splitting the country into 2 times zones would
make things confusing for the north and south
where people living right next to each other
would be in a different zone. Hence, the decision
to split the difference and put everybody on
one time zone.