Printing events that are not seen on screen-sample attached

This is a strange one...

I use ical for our production calendar. I have dozen or so different calendars tagged in different colors. This works great for us with the expection their is an event that is printing on a Saturday that isn't seen on screen. It its tagged with one of my calendars. Here is the calendar with a screen shot and one printed as pdf. Same month and everything. Please email me maryann.martin@robson.com.