It is a silly idea, of course. Our Earth has been around for thousands and/or billions of years and will be here for thousands and/or billions more, whether we have a holiday for it or not. Even more infuriatingly, it's not even a real holiday, so I still had to come to work today! Thanks for nothing, hippies!
But that's not the worst part, of course. The plain fact is that this so-called "holiday" is a highly dangerous idea, for a number of reasons.
First of all, the so-called "teach-ins" that will be hosted across the country will likely be highly influential on the minds of the general public. Let's face it: most people out there (with the obvious exception of my regular readers, of course) are gullible meat-heads who will obey anything told to them by a so-called scientist wearing a short-sleeve shirt and a tie.
Secondly, the designation of Earth Day without corresponding holidays for the other bodies in our solar system will no doubt anger them. As we know from centuries of Astrology, planets have extremely fragile egos. If we anger them by singling out Earth for a holiday, they will undoubtedly punish us with bad luck in our financial situation and personal relationships, and may even send an asteroid or two our way out of sheer spite.
Finally, the dedication of a holiday to our planet may dangerously overinflate the Earth's ego. This could cause our Earth to swell with pride and accreted matter to gigantic proportions. Our comfortable terrestrial planet may turn into a gas giant, crushing all of us with its massive gravity and drowning us in liquid air.
As irony would have it, this Earth Day intended to save our planet may indeed be the thing that brings life as we know it to an end!