I'm sure there is.
If you look in the default.html template you'll see a line <%IF DISPLAY%> followed several lines later by <%/IF%>. That block of code prints the grid cell information if there is any.
You should be able to change the <%/IF%> to <% ELSE %> then insert the code you want printed into blank cells after it, then end that code with the <%/IF%> statement.
Alternately, the previous forum message "Month Wrap" describes how to insert other months' data into what would normally be blank calendar grids.
Dan O.
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Customization
