Very odd. Even though I’ve been using Internet Explorer 11 and SharePoint 2013 together for some time, this morning, when I created a new Site Collection and added a Calendar, it wasn’t rendering as it should and many links were broken.
After a little research, it seems that IE11 doesn’t work out-of-the-box with SharePoint 2013 and boils down to an inconsistency with the X-UA-Compatible meta tag.
To overcome this, I added a new URL rewrite rule into IIS that spoofs the User Agent of the visitor’s browser, forcing the SharePoint page to be rendered correctly. No Compatibility View required.