Earth Day

as an annual ecological awareness event on April 22, dates to 1970; the idea and the name formed in 1969.

Online Etymology Dictionary, © 2010 Douglas Harper

Examples from the Web for earth day

  • No water in fountains, water in toilets only during part of an Earth-day.

    The Planet Strappers|Raymond Zinke Gallun
  • A dark shadow blotted out the brightness of the Earth-day for him.

    Slaves of Mercury|Nat Schachner
  • Despite the heavy cloud cover, the afternoon was as bright as an Earth-day.

    Wind|Charles Louis Fontenay
  • The local day would be something more than an Earth-day in length.

    Operation: Outer Space|William Fitzgerald Jenkins