-

539
Christmas Bird Count
-

540
Fall colours below Mount Sneffels near Ridgway, Colorado, United States
-

541
World Elephant Day
-

541
Village of Saranac Lake, New York, United States
-

541
The Nutcracker performed by the Turkish State Opera and Ballet in Türkiye
-

541
Boxing Day
-

544
Oktoberfest begins!
-

546
World Migratory Bird Day
-

550
World Dolphin Day
-

551
International Lighthouse Lightship Weekend
-

552
Thousand Islands region, St. Lawrence River, USA-Canada border
-

552
Thick-billed raven, Simien Mountains, Ethiopia
-

554
St. Gregory Church in Ani Ruins, Kars, Türkiye
-

557
Autumn equinox
-

558
European fallow deer in England
-

562
World Honey Bee Day
-

562
Nuuk, Greenland
-

566
World Population Day
-

567
Village of Santa Maddalena, Dolomites, Italy
-

567
Least chipmunk, Kootenai National Forest, Montana, United States
-

568
International Day of the Worlds Indigenous Peoples
-

569
Plate ice along Lake Superior, Grand Marais, Minnesota, United States
-

574
St. Barbaras Cathedral, Kutná Hora, Czechia
-

582
National Mushroom Day
-

582
Bormio, Lombardy, Italy
-

587
International Whale Shark Day
-

587
Winter solstice
-

588
International Rock Day
-

588
Rolling hills of the Palouse, Washington, United States
-

589
Barracudas at Shark Reef, Ras Mohammed National Park, Sinai Peninsula, Egypt