When using Yoast SEO you may notice the title tags for the main events views (Month, List, Map, etc) all say Event Archives instead of Events for August 2015 or similar.

Like this:

Yoast Event Archives Rewrite
 Instead of this:
TEC Titles

This happens because the main event views are archives in WordPress and Yoast is rewriting them as their plugin is designed to do.

To stop Yoast SEO from rewriting the event archives title, you can download this little plugin file and activate it to your site.