Earth Day is an annual day on which events are held worldwide to demonstrate support for environmental protection. Earth Day is observed on April 22 each year. The April 22 date was designated as International Mother Earth Day by a consensus resolution adopted by the United Nations in 2009. Earth Day is now coordinated globally by the Earth Day Network, and is celebrated in more than 192 countries every year.
How to make this day count?
It is the simple things that show you care about the Earth and it's environment. There many conservancies and Environmental bodies that have competitions and "donate" programmes that you could contribute to, such as UNEP,WWF and many more!
You could also just plant a tree, clean up by picking up litter in you area or simply send and E-card with a special Earth day message!