Amit Badkas

Calendar Archives is a visualization plugin for your WordPress site which creates yearly calendar for your posts. Create a new page (having ‘no sidebars’ template) for your calendar archive and insert the shortcode [calendar-archive] in the editor. Load this page and enjoy the view!
Each day of calendar will display first available photo from posts of that day in the background. The plugin’s layout is customizable and having two working layouts for demonstration
For more details, see http://www.sanisoft.com/blog/2009/08/21/wordpress-plugin-calendar-archives/

Calendar Archives

Calendar Archives is a visualization plugin for your WordPress site which creates yearly calendar for your posts.

alek

Shows a popover with list of links to the posts of the month/day.
Compatible with ARCW 1.0.9+
This will not work if you don’t have Archives Calendar Widget installed/activated. 
Get it here : <a href="https://wordpress.org/plugins/archives-calendar-widget/" rel="ugc">Archives Calendar Widget</a>
There is no any settings, just install and activate.
<h4>Notes</h4>
Please use the Support section to report issues.

ARCW Popover Addon

Popover Addon for Archives Calendar Widget

Calendar Archives vs ARCW Popover Addon