Salman celebrates Ganesh immersion.

LOL… I think your just clutching at straws here.

The point wasnt how its celbrated today, but where BASANT ORIGINATED!

Actually because your to stupid to actually check, but that link is to a HINDU website, not Wikipedia.
Ok. Let me get this straight.

Here you have two holidays, which are actually the same, with the same name, celebrated in two different parts of the SAME country, by the very SAME people (Hindus in this case.)

The Website says that the origins of the Basant festival or Spring festival is the same as the Saraswati puja.

Now you dont deny this. YOU simply say that its not celebrated in such a way in Northern India.

Now just because its not celebrated as Sarawati Puja today in parts of India, including in Pakistan, that doesnt change the fact that the ORIGINS of this holiday are the Saraswati Puja.

Now again, you said that Basant Panchtami is nothing more then the celebration of Spring, and we all know that.

But what getting at is the actual orign. THE question is NOT how its celbrated today, but what the festival was meant to be about.
The point was that the BASANT festival has its origins in Saraswati Puja.

“The day of Basant Panchami is dedicated to Goddess Sarasvati”

AND

“The festival is celebrated with full vivacity and festivity to mark the end of the winters..”

It seems to me that the Basant of North India and the Basant celebrated as Saraswati Puja in Eastern India, have the same origins.

So technically, we in Pakistan and in North INDIA ARE celebrating a HINDU HOLDIAY devoted to Hindu goddess.