-

533
Martimoaapa Mire Reserve, Finland
-

536
Fall colours below Mount Sneffels near Ridgway, Colorado, United States
-

537
Oktoberfest begins!
-

539
World Migratory Bird Day
-

539
St. Gregory Church in Ani Ruins, Kars, Türkiye
-

541
Nuuk, Greenland
-

542
World Dolphin Day
-

547
International Lighthouse Lightship Weekend
-

547
Thousand Islands region, St. Lawrence River, USA-Canada border
-

547
Thick-billed raven, Simien Mountains, Ethiopia
-

550
World Honey Bee Day
-

550
European fallow deer in England
-

553
Autumn equinox
-

554
Plate ice along Lake Superior, Grand Marais, Minnesota, United States
-

562
World Population Day
-

562
Village of Santa Maddalena, Dolomites, Italy
-

565
Least chipmunk, Kootenai National Forest, Montana, United States
-

566
International Day of the Worlds Indigenous Peoples
-

568
St. Barbaras Cathedral, Kutná Hora, Czechia
-

570
Bormio, Lombardy, Italy
-

574
Winter solstice
-

575
Capitol Reef National Park, Utah, United States
-

576
National Mushroom Day
-

580
Barracudas at Shark Reef, Ras Mohammed National Park, Sinai Peninsula, Egypt
-

580
International Day of the Snow Leopard
-

581
International Whale Shark Day
-

582
Rolling hills of the Palouse, Washington, United States
-

583
International Literacy Day
-

583
Point Reyes National Seashore, California, United States
-

587
International Rock Day