title: Find a date between start_date and end_date
body: <p>I have a table of events with a recorded start and end time. I want to find all events that occur on a specific date. Some events started a year ago and some will continue farther ahead.  </p>
  
  <p>I would like to be able to pick for example May 20, 2010 and find all events occurring on that date.</p>