19 November was declared 'World Toilet Day' in 2001 by 17 toilet associations around the world, and it has grown, since then.
This is from their website:
The task is huge, 2.5 billion/40% of the world’s population is without access to sanitation. We alone can’t fight this situation but if you join us in this movement, its possible. At WTO we have a belief that "Change is possible. Because I'll make it possible."
Each of you can be a change agent by contributing your time, talent, skills and commitment to make it happen. We need everyone and anyone whether a student, housewife, executive, artist, schools, universities, corporations, institutions originating from any part of the world, of various language, religion, ethnicity and ideological persuasion, to come together and join the movement towards delivering toilets to 2.5 billion toilet-less
When they're talking about 2.5 billion people being without toilets, that means they don't even have an outhouse; no place to sit to pee or poop. No place safe, in many areas in our world to just take care of your personal business. Think about how this would affect you personally. It puts it in a whole new light, when your do this.