-

5452
National Bison Day
-

5460
Finnish Independence Day
-

5460
Basilica of Santa Maria della Salute, Venice, Italy
-

5462
World Meteorological Day
-

5462
Crescent-tail bigeye fish, Great Barrier Reef, Australia
-

5465
Tulips at Emirgan Park in Istanbul, Türkiye
-

5465
National Hispanic Heritage Month
-

5468
Glacial rivers in Iceland
-

5474
National Park Week begins
-

5483
Champaka Sarasi, Shivamogga, Karnataka, India
-

5484
The Sonoran Desert, Arizona
-

5485
Cypress trees in George L. Smith State Park, Georgia
-

5488
Friendship Day
-

5490
Medieval towers in Mestia, Upper Svaneti, Georgia
-

5502
Spring equinox
-

5510
Kochia, Hitachi, Ibaraki prefecture, Japan
-

5513
Star Wars Day
-

5520
Cherry blossoms in Shanghai, China
-

5520
Frost-covered dunes on Mars
-

5521
Wadden Sea coast, Friesland, Netherlands
-

5523
April Fools Day
-

5525
World Rhinoceros Day
-

5527
Aspens in the White River National Forest, Colorado
-

5527
Frankenstein Friday
-

5527
Sea lion in a kelp forest, Baja California, Mexico
-

5529
International Day for Biological Diversity
-

5530
European river otter, Netherlands
-

5536
National Blueberry Day
-

5539
Patriot Day
-

5541
European Day of Parks