The period between September 1 and October 4 is "Time for Creation." The beginning and the end date of Time for Creation are linked with the concern for creation in the Eastern and the Western traditions of Christianity, respectively.
September 1st was proclaimed as a day of prayer for the environment by the late Ecumenical Patriarch Dimitrios I in 1989.
The Orthodox church year starts that day with a commemoration of how God created the world. On 4 October, Roman Catholics and other churches from the Western traditions commemorate Francis of Assisi, known to many as the author of the Canticle of the Creatures.