Hmm thought it was one I saw in the wiki. Maybe it was one I spotted in another addon or a thread posting somewhere here.
edit: Hmm, looks like some of the events that were there before aren't there now. Not sure if it was intentional or not but look at this link which is the original page that was there.
http://wiki.esoui.com/w/index.php?title=Events&oldid=6
The "data" field is what I use to know I have definitely reached the data I want. You probably could change that to your guild name instead or remove it.