If this is truly an issue of underrepresentation, why not contribute to Wikipedia all year long? Why do it one weekend a year? Am I missing something or are women being actively blocked from editing Wikipedia? I'm confused.
If Wikipedia is the encyclopaedia by and of the people, it should strike us all as strange that only 10% of all its contributors identify as female (according to a 2011 survey by the Wikimedia foundation). According to New York-based collective Art + Feminism, this has led to significant gaps in content, and the collective are keen to fill in the gaps.