-

144
World Donkey Day
-

220
International Leopard Day
-

221
Star Wars Day
-

263
Field of blue agave near Tequila, Jalisco, Mexico
-

271
The glass dome of Galleria Vittorio Emanuele II, Milan, Italy
-

286
Keukenhof Gardens, Lisse, Netherlands
-

307
World Penguin Day
-

307
Belém Tower, Lisbon, Portugal
-

307
Kofa National Wildlife Refuge, Arizona, United States
-

320
Spectacled bear resting in tree, Ecuador
-

326
Thunderstorm above the plains, Bulgaria
-

333
Common clownfish, Raja Ampat Islands, Indonesia
-

339
International Day of Human Space Flight
-

357
World Heritage Day
-

372
Earth Day
-

374
Pink apple blossoms, Avila Beach, California, United States
-

375
International Bat Appreciation Day
-

377
Logan Creek Suspension Bridge, West Coast Trail, Canada
-

382
International Day of Forests
-

384
International Dark Sky Week
-

388
Easter Sunday
-

400
Short-beaked echidna, Adelaide Hills, Australia
-

403
African buffalo, Ngorongoro Crater, Tanzania
-

414
Wildflower bloom, Central Valley, California, United States
-

425
Papagayo Beach, Lanzarote, Canary Islands, Spain
-

427
World Theatre Day
-

434
Castle Day Japan
-

434
Seattle, Washington, United States
-

439
Skagit Valley Tulip Festival
-

441
Spring equinox