You can't tar all men with the same brush due to history. History is a reminder of how poor society once was.
The countries who do continue to oppress women shouldn't be mentioned, as there's a reason for the oppression, and it's not because they're men.
In my opinion, there shouldn't be an international celebratory day for an individual sex, as all it does is divide society. We should celebrate both of the sexes for all of their achievements, and for the progress we've made as a society in the Western world to attain the equality status that the sexes have nowadays. A celebratory day for one sex doesn't exhibit equality, but rather the inverse.