Nature Photography Day is observed annually on June 15th. It’s a day to view the world with your camera and maybe even advance the cause of conservation. From the event page:
NANPA again challenges its members to take nature photographs on June 15 and upload *one* for publication in the July/August issue of Ripples , our bi-monthly newsletter. This is not a contest. All photos will be published and there is no cost for submission. Photos for submission MUST be taken on June 15th, within walking distance of wherever you are on that day. Full details can be found on the Nature Photography Day Event Page.
Years ago, back when Flickr was the place for photography, I started a group for this event: June 15th – Nature Photography Day.