By David Nussman, Church Militant - An ecumenical "Season of Creation" begins this week, promoted by Catholic leaders... The "Season of Creation" is promoted annually by the World Council of Churches... It kicked off Tuesday with the World Day of Prayer for the Care of Creation and runs until Oct. 4.... in 2015, Pope Francis called on the Catholic Church to join the Sept. 1 ecological prayer day... This year's "Season of Creation" has as its theme "Jubilee for the Earth," because it is the 50th anniversary of the first Earth Day, which was celebrated in 1970.