title: Oracle TO_CHAR output includes BC
body: <p>When I run</p>
  
  <pre><code>select *
  </code></pre>
  
  <p>I don't get my date because they are negativ and i see them with :</p>
  
  <pre><code>Select to_char(start_date,'DD/MM/YYYY AD'),s.*
  from LIST s
  where start_date&lt;to_date('00010101 00:00:00', 'yyyymmdd hh24:mi:ss')
  order by s.start_date desc
  </code></pre>
  
  <p>But they are written  like <code>22/03/2016 BC</code></p>
  
  <p>Where did the <code>BC</code> come from? 
  Does someone have a clue on how my date becomes negativ sometimes ?
  Because sometimes they are "normal" dates and sometimes they got the BC ... </p>