title: How convert a string into a ActiveSupport::TimeWithZone?
body: <p>I need to update a field (called <code>updated_at</code>). The field in MySQL is of type <code>datetime</code>, and the class is <code>ActiveSupport::TimeWithZone</code>. But the dates are <em>strings</em> like <code>"10/17/2008"</code>. I used <code>"10/17/2008".to_date</code> (And I intend <code>.to_time</code> and <code>.to_datetime</code>), and even if in console the ActiveRecord class save successfully, the field in the database still is the current date.</p>