Let's wear green today!
St. Finian's Bay, County Kerry, Ireland (© Atlantide Phototravel/Getty Images)

Let's wear green today!
St. Finian's Bay, County Kerry, Ireland (© Atlantide Phototravel/Getty Images)

Gentle giant of the dunes
Elephant Rock, Al-Ula, Saudi Arabia (© Lubo Ivanko/Shutterstock)

Gentle giant of the dunes
Elephant Rock, Al-Ula, Saudi Arabia (© Lubo Ivanko/Shutterstock)

Hop into spring!
Tree frog on leaf (© Tetsuya Tanooka/DEEPOL by plainpicture)

Hop into spring!
Tree frog on leaf (© Tetsuya Tanooka/DEEPOL by plainpicture)

Cherry trees spring to life
The Jefferson Memorial during the Cherry Blossom Festival, Washington, DC (© f11photo/Shutterstock)

Cherry trees spring to life
The Jefferson Memorial during the Cherry Blossom Festival, Washington, DC (© f11photo/Shutterstock)

Celebrating forests
Bwindi Impenetrable National Forest, Uganda (© Art Wolfe/DanitaDelimont.com)

Celebrating forests
Bwindi Impenetrable National Forest, Uganda (© Art Wolfe/DanitaDelimont.com)

'Water' we celebrating?
Blue Spring, Te Waihou Walkway, New Zealand (© Ian Beattie/Alamy)

'Water' we celebrating?
Blue Spring, Te Waihou Walkway, New Zealand (© Ian Beattie/Alamy)

Making a fog-cast
Large anvil clouds above the Amazon in Brazil (© NASA)

Making a fog-cast
Large anvil clouds above the Amazon in Brazil (© NASA)

Where are these birds of a feather?
Silvereyes with cherry blossoms, South Korea (© TigerSeo/Getty Images)

Where are these birds of a feather?
Silvereyes with cherry blossoms, South Korea (© TigerSeo/Getty Images)

Painting the town
Celebrating Holi in Mathura, Uttar Pradesh, India (© Avishek Das/SOPA Images/LightRocket via Getty Images)

Painting the town
Celebrating Holi in Mathura, Uttar Pradesh, India (© Avishek Das/SOPA Images/LightRocket via Getty Images)

A tidal tango
Seawater cascades over an ancient coral reef, Hang Rai, Vietnam (© Thang Tat Nguyen/Getty Images)

A tidal tango
Seawater cascades over an ancient coral reef, Hang Rai, Vietnam (© Thang Tat Nguyen/Getty Images)

Theater takes center stage
Teatro Colón in Buenos Aires, Argentina (© Wei Hao Ho/Alamy)