Un-registers the default Calendar widget, and registers a new one which supports showing only those posts in certain (or all) categories.
Can add multiple calendar widgets – each of them set to different categories (or All Categories).
The tooltip on the per-day links shows only post titles from that category, and when you click on the calendar link to bring up the day archive of posts, only posts from that category are shown.
calendar-category
folder to the /wp-content/plugins/
directory.Make sure you’re on the latest version of WordPress, then let me know, with as much detail as possible, what the problem is.