Why there is no holiday for Tamil new year in Kerala, Karnataka, Andhra but in Tamilnadu they are given holiday for their new year, do Tamilnadu government should also follow the same rule as neighbouring states protecting their state rights?

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With your question there are several follow up issues are coming up.

Why there are no holidays for Diwali, Ganesh Chaturthi, Kandha Shasti in Europe, US, Middle East but in India they are given holiday for Christmas, Bakri Id.

Do Indian Government should also follow the same rule as Middle East, Europe, US protecting our rights?