northcoasttriclub,
Thanks for getting in touch! Since you’ve confirmed that the tooltips work fine in Twenty Thirteen, that tells me that there is something conflicting with your theme or a customization that’s been made in your theme. Upon further inspection, I’m not seeing the ‘<div class=”tribe-events-tooltip”>’ that normally displays after the Event link in month view (screenshot of how it appears in my test environment).
Since this is a conflict with something in your theme, I would suggest reaching out to the developer of your theme for further help. We’ll be here to answer any questions they might have as the investigate further.
Thanks! 🙂
-Casey-