Cloudspotters across the world contributed their skies to the 2023 Memory Cloud Atlas on Cloud Appreciation Day.

Cloud Appreciation Day, 2023

Cloud Appreciation Day happened on Friday September 15th, 2023. It is an internationally recognised day when people around the world are encouraged to spend a few moments with their heads in the clouds, appreciating the beauty of the sky. On Cloud Appreciation Day, anyone anywhere can contribute their sky for free to our Memory Cloud Atlas.

While it is open for contributions on the day only, the Memory Cloud Atlas remains online after Cloud Appreciation Day, preserving the views of cloudspotters for others to explore. It serves as a snapshot on a single day of a worldwide appreciation for the most dynamic, evocative and accessible part of nature, the sky.

The next Cloud Appreciation Day will happen on Friday September 13th 2024.


The Memory Cloud Atlas is a collaboration with artist Justin Wiggan that is open for contributions on Cloud Appreciation Day from anyone anywhere for free. Contributors can upload a photograph of their sky on the day and add some words about how the sky makes them feel.


Our Cloud Appreciation Pack includes free lesson plans, resources and activities for schools and homeschools. We encouraged teachers to use the pack of resources to make Cloud Appreciation Day on Friday September 16th the focus of a week of lessons about the sky and clouds. The Atlas now serves as a resource to show young cloudspotters skies from right around the world.

Cirrus fibratus spotted over Sydney, Australia by Tom Olson
Altocumulus at sunrise spotted over Kingston, Kent, England by Sue Hodgkins (Member 10,290)
Cirrus intortus spotted over Lompoc, California, US by Jeanette Brown
Altocumulus lenticularis spotted over Helena valley, Montana, US by Jana Walker (Member 54,383)
Anvil crawler lightning spotted over Visakhapatnam, India by Ashok Kolluru
Mamma spotted over Boulder, Colorado, US by Kyoko Saegusa
Stratocumulus spotted over Toronto, Ontario, Canada by Kristen-Rose DiMartino (Member 47,377)
Cumulus and Stratocumulus spotted at sunset over Zhejiang Province, China by 玮 徐 (Member 50,559)