When? 1 September (beginning of Creation Time, 1 September - 4 October)
In a Report to the Methodist Conference 2016, "the people called Methodists are encouraged to join with their sisters and brothers in the Catholic and Orthodox Churches in observing the World Day of Prayer for the Care of Creation. Prayer and worship resources are produced annually by Churches Together in Britain and Ireland and are commended for wider use. Churches, Circuits and Districts are also challenged to think again about taking practical steps to express their care for God's creation [...]."
A wide range of resources for Creation Time are available in Singing the Faith's Climate and Creation section.
The World Council of Churches also has a collection of almost 80 short videos on the subject, which can be accessed via YouTube.