title: DateTimeField received a naive datetime
body: <p>I have model with <strong>DateTimeField</strong> column.</p>
  
  <p>I'm try to insert row with database <strong>current_time</strong> value directly into table by sql query.</p>
  
  <p>My sql query for MySQL database like:</p>
  
  <pre><code>INSERT INTO MyTable (..., my_datetime, ...) VALUES (..., current_time, ...)
  </code></pre>
  
  <p>And get:</p>
  
  <blockquote>
    <p>RuntimeWarning: DateTimeField ModelName.field_name received a naive
    datetime (2014-01-09 22:16:23) while time zone support is active.</p>
  </blockquote>
  
  <p>How to insert current time directly into table by sql query without warning?</p>