Arbor Day in Namibia

Energy Efficiency Day on October 5;

Arbor Day in Poland on October 10;

Fall World Migratory Bird Day on October 12 (UNEP);

National Fossil Day in USA on October 13;

World Environmental Education Day on October 14 (established in 1991);

Gardening Day in Sri Lanka on October 15;

International ShakeOut Day on October 17 (Drop, Cover and Hold On! If nothing else, remember to take those three steps if and when an earthquake strikes)