no..pandit nehru's birthday is not a national holiday.Jawaharlal Nehru was known to be very considerate towards children.I do not have any solid instances but here is an outline of it all:

The beloved 'Chacha' Nehru as he was called because he was very kind and loved children.This was a loving nickname adopted in order to show how much he liked kids and how much they loved him too.

Nehru was very passionate about the welfare of children,he would frequently launch programmes,to provide meals and few daily necessities for school going children.

He had launched a number of welfare programs for children in his tenure.These programs ensured and targeted at providing safety and the 'necessary' requirements of the children.

Nehru believed in education being a key to success,therefore he had launched various education missions and schemes to make people aware of the importance of education,indirectly benefiting children.He pioneered the education of the youth and believed they were the'Future of the country'.

Overall,Children's Day is merely a way or an excuse to celebrate the birth anniversary of the legend.There is no definite or significant contribution he has made for children.