Really? The calendar? That's what you chose to nitpick about? Talk about obsfucation, lol.
How about fukking architecture, agriculture, harnessing exectricity, the internal combustion engine etc. Human and civil rights? Medicine?
Yes, it could have. But it would be wrong. Black people's contributions are well documented. Just like it's well documented that men are the major contributors in basically every field that you can think of.
Begging your pardons, but how is that a rebuttal? You've just proved my point. Those fields are traditionally run by men because men show the most competence in them.
Do you really think that if a woman invented the lightbulb her contribution would have been ignored?