I'm going to put it this way and I just hope this will resonate.

Do you feel that, worldwide, as a whole, the lives of men and women are equal? Do you think that nobody in the world is discriminated against for their gender or do you think that for every woman in the world oppressed men for being a woman that there is a man oppressed by women for being a man? Do you think that there are systems set up by women to keep men out of positions of power? Are there any countries in the world dominated by women who keep men down?

If you believe that premise, then you can just ignore me because you won't agree with this. If you do believe that, in many countries, there is oppression against women with no equivalent country where men are equally oppressed by women, then wouldn't it seem insensitive to have an international men's day? Think of women in Saudi Arabia who aren't allowed to drive, in Afghanistan where they have to cover themselves from head-to-toe, baby girls in China who were killed because parents were only allowed to keep one child and wanted a boy, India where young girls (mostly girls if not all) are trafficked as sex slaves, Somalia where 95% of girls undergo genital mutilation, think of women who are forced to marry their rapists. How would it seem to have a day celebrating men to tell women who live in countries where men are their oppressors, where men control their lives and run their world that they should remember to appreciate men?

I'm not saying there's anything actually wrong with having an International Men's Day. It has some good goals, but you can understand why internationally people would be hesitant to promote it. International groups tend to focus on causes aimed towards oppressed groups and poverty issues.