The way the TZDB works is that if all areas of a country have used the same time rules since 1st January 1970, there will be a single time zone entry for that country.

Are there any parts of India that have not used the same time rules as Asia/Calcutta (Asia/Kolkata?) since 1970-01-01? If not, there is no reason to introduce any new zones. If you have an application that wishes to provide alternative names, then you may. It is not recommended that the names in the database are shown to end users in any case.

This is discussed in the theory.html file distributed with the TZDB data.

On Mon, Oct 12, 2020 at 8:47 AM Bharat Adur <bharatadur@gmail.com> wrote:

Dear Sir
Indian is very large country with over 130 billion population with 28 states and over fifty major cities including Mumbai.
However in your catalog list for India in tz list , we have only as Asia/Calcutta.
Can you kindly introduce in python in tz it should locate the place and th local time,
with best regards
Bharat Adur

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