Nope there isn't as far as I know and whilst I agree in one sense, it's not actually the fault of the organisers of International Women's Week that no men have decided to organise their own.
International Women's Day (March 8th) is an event that is recognised in over 80 countries and recognised by the United Nations. In some countries it is actually a national holiday (which men get as well). It's been going for around 90 years and its aim is essentially to highlight the plight of many women around the world in countries that are not so enlightened as Western ones, and it is also a celebration of 'look how far we've got' in the last 90 years.
See this link
http://www.internationalwomensday.com/default.asp
It is not, most definitely NOT, and has never been anti men in any way and men are quite welcome at any events, it is simply pro-women!