We'll create fresh WordPress site with WP Moon Phase Widget installed. You have 20 minutes to test the plugin after that site we'll be deleted.
WP Moon Phase Widget plugin allows you to add an awesome moon phase widget to sidebar or post.
You can learn more about moon phase here
You can add a widget as a standard WordPress widget.
You can add the widget to post or page via shortcode:
[mph-widget]
With specified background color:
[mph-widget color="#ffffff"]
You can use only one widget at a time. So if you want to add it to post, delete it from the sidebar.
Based on moon-phase-widget javascript library.