When : Always April 29th
Japanese Greenery Day celebrates the birthday of Japanese Emperor Hirohito. In Japanese culture, Greenery day is a time to commune with nature and to be thankful and appreciative of it's abundance.
Celebrate Greenery Day with a nature walk or by doing a project to improve or preserve nature.
More Details...
All details taken directly from provider content at http://holidayinsights.com/moreholidays/April/greenery.htm