On the main Zoneminder screen. Each event title for hour/day/week or whatever. The number you click to bring up that range's list of events.
What:
Add a title="string" to the 'a' tag where string is the date of the most recent event.
Example:
Hovering the mouse over any of the numbers for any of the cameras in "Events Hour Day Week Month Archive" would display the time or date of the most recent event.
(Even IE now supports popup Titles for links and images, would be useful to quickly review when events happened without adding clutter to this page)
Quick hack at page source with a title tag addedwhilst hovering over a particular number:
