Archives By Month?

Is there a place in WordPress where you can type in a description for date-based archives? If so, then yes. If not then no.

Categories, tags and authors seem to be the only archive types that support this.

Sorry, I mean something default for month, instead of being blank.
Example: Archives for July {I understand it wan’t have a description}

Sometimes this will be included in a theme, sometimes not I guess. I don’t know how your theme is configured, but you could

a) Edit your archive template and use get_the_date() inside the loop to display a custom message, or
b) Add code to functions.php to do it, or
c) Find/create a plugin that does it.

Sorry I can’t be more help here but this is beyond the scope of this plugin.