title: ORACLE 10g : To_date() Not a valid month
body: <p>So I have this little script :</p>
  
  <pre><code>set serveroutput on;
  DECLARE
    val DATE;
  BEGIN
    val := TO_DATE('27-Jan-2001','DD-Mon-YYYY');
    dbms_output.put_line(val);
  END;
  </code></pre>
  
  <p>The mask match with the date I'm inputing but it displays </p>
  
  <blockquote>
    <p>ORA-01843: not a valid month</p>
  </blockquote>
  
  <p>every time...</p>
  
  <p>Thanks</p>