We live on Earth everyday. Just because Father's Day and Mother's Day only comes once a year does not mean we ignore our parent's needs the other 364 1/4 days.
Would you tell your Mother to wait for Mother's Day if she asked you for help? Then why do the same thing to the planet that provides for our needs everyday?
It is nice that we have a day of remembrance for our beautiful planet, but if we ignore the message of earth day the rest of the year the whole point of the day is moot.
So make every day Earth Day and see what a difference you can make on your local environment and the community that you live in.
We also have the history of earth day and 50 things that you can do. But for the more serious of you we have a site that will dramatically change you, your life, and your world for the better.