Scroll down to find several photos that you can share via social media.

Right-click on the image and select "Save Picture As..." (or "Save Image As") to save to your computer desktop. When on your social media platform, browse to find the file in order to add the image to your post, as in the following examples:
FACEBOOK
Compose your post, and find the file using the Browse button
TWITTER
Compose your post, and find the file using the Camera icon
Once posted, it appears on your FB event page like this ...
Once posted, it appears on your Twitter feed like this ...
Clicking on "View photo" produces this ...

 

Photos