Please help me remember how I did this

I need help remember how I accomplished something a few months ago. I'm using the calendar and date modules on my church's website to display a calendar of events related to the church. Most of these are weekly events such as bible studies and weekly services. I used the repeat module to make these events repeating. Because of this though when I clicked on an event in the calendar, the little popup bubble would appear to show the details of the event, however it would list every single time the event was scheduled before displaying any details. This obviously won't work for our repeating events as the list is quite long. When I originally set the site up a few months ago I figured out a way to hide these. I remember using the firebug extension for firefox and figuring out a way to add some css code to either the date.css or calendar.css files to hide where it shows the date and time in the popup bubble.

Today I upgraded to the newest version of both the date and calendar module, and forgot to backup my files before doing so. Now I'm back to the original problem and unfortunately I can't remember how I fixed it in the first place. I'm still very new to all of this (my first time dealing with either drupal or css was in august), so I'm not really surprised I forgot. Can anyone give me any suggestions as to how I may have accomplished this?