AddThisEvent

gistfile1.html

<a 
  class="add-this-event-link"
  href="#" 
  title="Add to Calendar" 
  data-start="10-05-2014 11:38:46"
  data-end="11-05-2014 11:38:46"
  data-timezone="Copenhagen/Europe"
  data-title="Summary of the event"
  data-description="Description of the event"
  data-location="Location of the event"
  data-organizer="Organizer"
  data-organizer-email="Organizer email"
  data-all-day-event="false"
  data-date-format="DD/MM/YYYY">
  
  Add to Calendar
  
</a>