Our most recent Editors’ photo challenge, ‘The Blue Hour’, is open for submissions. The blue hour is a period shortly before sunrise or after sunset when the sun is below the horizon but still provides enough light to make the sky appear deep blue in photos.

For this challenge, shoot and submit one or more blue hour photos. They don’t need to be taken someplace exotic, but creativity is encouraged. You can enter up to three photos in this challenge. Make sure to submit your entry by Saturday (GMT).

Visit the challenge page to read the full rules and to submit your photos for consideration.

Enter your photos here