April 22 may just seem like a normal spring day. But back in 1970, it was the first celebration of Earth Day, a holiday stressing the need for environmental reform and conservation. In the more than ...

PHILADELPHIA (WPVI) -- Action News is bringing you 50 days of coverage leading up to the 50th anniversary of Earth Day in April. On April 22, 1970, Earth Day became an official United States holiday.

"Earth Day has always been an event of the people." On April 22, 1970, 20 million people across the globe celebrated the very first Earth Day. The idea was sparked by the power of the anti-war ...