By their nature, the DPCalendar Calendar and Events views have Next and Previous buttons for navigation.  

The problem is that when the search engine crawls these pages, it will waste huge amounts of time travelling both into the past and into the future, following the Next / Previous links. 

To prevent this:

• We set Robots: No Index, Follow on all Calendar and Events menu items, which causes  <meta name="robots" content="noindex, follow" /> to be inclduded in the page header.
• We add the following to robots.txt:
  

  Disallow: /*?*date-start=* Disallow: /*?*date-end=*