Women are leading in all fields- right from politics (Sonia Gandhi, Mayawati) to sports (Sania Mirza). We used to perform Sati in once upon a time. And today these woman are also leading in corporate also, (Ms Nooyi).
Today if we find a day to celebrate for them then whats wrong.... So there is no gender partiality, but still after a long day toil and hardwork, if we sit with our mother, sister, wife and sister-in-law to celebrate and cut a cake, they would feel good.
So to fetch a smile on their sweet face we must celebrate women's day.