Arbor Day in Germany
Arbor Day in Germany is held on April 25. This event in the third decade of the month april is annual.
Chemists Celebrate Earth Day in USA on April 22 (In 2003, the American Chemical Society joined in on April 22's festivities. Each year, ACS highlights one of four general topics and chooses a theme—this year it's "Our Earth: Handle With Care"—to focus the celebration and highlight how chemists can contribute to a greener world);
Green Up Day in Vermont on May 1 (observed on the first Saturday of May, is a statewide effort in the US state of Vermont to clean up roadside trash);
Greenery Day in Japan on May 4 (みどりの日 - Until 1988, April 29 was celebrated as the birthday of Emperor Showa. It was decided to keep this day a holiday even after his passing away in January 1989 and to name it Greenery Day because of the late Emperor's love of nature. In 2007, April 29 became Showa Day, and Greenery Day was moved to May 4);